[member=64030]TinyShop[/member]
My responses (in
blue) to your various points (in black) follow:
"First of all, I have been a Registered Patent Attorney for almost 50 years. As a Patent Attorney I have prosecuted approximately 500 patent applications before the U.S. Patent and Trademark Office, and I have litigated scores of IP cases in about a dozen U.S. District Courts. I have also handled many, many IP licensing and transactional matters, whereby I know that I am qualified to speak as an expert on IP matters. I am not sure, though, what (if any) qualifications you may have in that regard."
Curious, I would have thought that, if anyone, a patent attorney would understand the importance of full disclosure and giving credit where credit is due. I merely picked up on Mr. Goetzke's clear frustration and then spent a few minutes trying to understand the source of same. Reading through the readily available thread that I linked to earlier, it doesn't take being a patent attorney (or a rocket scientist) to smell injustice and slimy behavior (as I and others would argue has been committed by the person behind the Dustopper).
"With regard to your comment about, "... how much the Festopper steals from Festool's CT-VA design..." the answer is zero. Had you actually read what I wrote, you will note that I do not claim that I did anything other than design and implement a "collection box" that has a bottom that locks onto a Festool Dust Collector, and a top that interfaces with the commercially available Dustopper device sold by The Home Depot. Can you design something that will do the same? Frankly, I don't know, but feel free to do so, as I am sure that when you attempt to do so you will have a far greater understanding and appreciation for the fact that it was not a trivial exercise. I am also quite certain that the design of the FESTOPPER is such that, at $60 in parts, it accomplishes pretty much the same result that the $300 Oneida and the $375 Festool versions accomplish at a cost that is far more palatable to hobbyist (as well as many professional) woodworkers. By the way, as shown in the attached photo, the FESTOPPER can be placed under an MFT/3 table, something that the Oneida unit cannot do."
Words are one thing, actions are another. The concept behind your "Dustopper" (a low-profile baffle-type dust separator which is designed to nest onto a Festool dust extractor) is quite akin to Festool's new CT-VA...at least I think it is. The timing of your release is also curious, coming as it did some time after (and not before) the public release of the CT-VA. Regarding your design: you built it, you photographed it and then you posted it, essentially as an ad, on a forum that is supposed to honor a certain DIY ethos. Had you not offered from the get-go to sell your plans but instead only come around to the idea once multiple people requested them (which is how these types of interactions typically go), those of us who balked at your unpalatable approach would have been only too happy to support you. So, yes, you brought this push-back on yourself.
Now, regarding your odd insinuation that I might not know my way around a hammer, let me respond by saying that I am perfectly confident in my abilities to accomplish the following seven (7) tasks which are required to construct a DIY systainer'ized "Thien/Dustopper/CT-VA/Festopper"-inspired dust separator:
1. build an open-topped, seven-sided plywood box (with interior joints caulked for air-sealing);
2. attach a set of 3D-printed systainer cleats (attributes, in part, to [member=40705]Ben_[/member] !) to the bottom and front of the aforementioned box (to allow simple locking attachment to the top of the vac via a T-Loc hose garage or already affixed T-Loc systainer or via a classic-style sys-plate of choice) [another image of the latter);
3. cut an appropriately-sized hole in a piece of plywood (the latter to act as the lid of the box) in which to accept the Dustopper product as an insert;
4. caulk the latter into the former;
5. drill eight holes and use four threaded inserts and four star knobs (I'll probably make my own) to fasten the lid to the top of the box (or utilize some other method of easy-on/easy-off attachment) but not before adding a strip of foam to the edges of the box's open side (to act as an air-sealing gasket between the lid and the box);
6. gather together the appropriate hose fittings (in my case to go from the 57mm friction-fit vac-end on my 35mm hose to the inlet on the Dustopper - no additional fitting necessary - and then from the male vac-end of the Dustopper supplied hose to the 58mm inlet on my Starmix extractor - accomplished with one "Shop-Vac 1-Piece Right-angle Brush" [Lowes # 215752 Model # 9067911] with the brush removed) (even cheaper tax-free source); and
7. hook everything together.
Total cost? I expect around US$60-70 (assuming scrap plywood and DIY star knobs).
Heck, if I feel like it, I may even offset the position of the Dustopper in the lid (to get the inlet flush with the edge of same) and then partially or fully enclose the Dustopper in it's own plywood box (if fully enclosed, adding penetrations for the inlet and the outlet hose) and then fasten a set of these 3-D printed fittings to the lid (along with one of these custom latches) or perhaps instead employ a modified version of this (with the undersides of the back penetrations relieved to allow the dove tail rear systainer feet to slot into place (and, again, this locking latch or a shop-built equivalent) to allow the fitting/stacking of systainers up above.
"Regarding the design used in Festool's CT-VA, as I said in my earlier post, it is different from the design promoted by Phil Thien, as well as from the Dustopper design, but it, too, is virtually identical to prior designs that I have seen. Again, I am speaking from the perspective of one who has actually seen the inside of the CT-VA, something that you, clearly, have not done, or you would realize that the CT-VA uses a disk at the bottom of a tube that has a rectangular opening which is keyed to be oriented at a particular angle from its input. Neither Phil Thien's version, nor the Dustopper, have anything similar."
That's funny, that's exactly what I meant when I said, "...that Festool's design departs from Thien's enough [emphasis added] that one would never mistake Festool's for Thien's (or vice versa)." Not sure how you took this mean that I think the CT-VA is the same as Thien's baffle. Moreover, one doesn't need to have the CT-VA in hand to understand the design of its baffle.
"As far as the use of the word "cyclone" is concerned, you should be aware that that term came from meteorology, rather than woodworking. As such it refers to the rotation of the airflow, rather than the means that created the rotation, whereby those who think that a "cyclone" separator requires a conical device, such as the Dust Deputy, are simply incorrect, by definition. Consequently, all of the devices that use rotational air flow to separate sawdust, etc. are "cyclone separators"."
Ok, now we're just splitting hairs. The context of all of this is that the word "cyclone" proliferates the woodworking dust separation world. However, when discussions focus in on comparisons between the Thien baffle and devices like the Dust Deputy (for instance), usually the word "cyclone" is reserved for the latter while "baffle" is reserved for the former (as a way to easily distinguish between the two). It's only natural, therefore, that a company marketing its own ultra-low-profile (and in that way "similar" to Thien's) dust separator would, out of an abundance of caution and perhaps also "respect", want to give a wide berth between its product and what most people know and refer to as a "baffle" (the term, at least up until now, that is commonly associated with Mr. Thien's design).
Now, to the point you try to make about what I may or may not know about dust separators and meteorology (in the case of the former, a little something given that I've been both a professional and amateur woodworker for decades and, in the case of the latter, also a little something given that I happen to be a former airline captain), only a poorly informed person/woodworker would think the word "cyclone", in the context of a dust separator, has any real meaning beyond that of a catchy marketing term. Again, it's all about context.
In closing, I appreciate your thoughts. I also really appreciated the act of putting together my response. Doing so proved to be a very fruitful exercise as I now have the parts list I need to construct my very own systainer'ized "Thien/Dustopper/CT-VA/Festopper"-inspired dust separator. All time well spent! 
"Sandy"