My apologies for coming across as confrontational and re-reading my post it does come across that way.
In some little mitigation, Joiners original post just diss'd the jig with no qualifying statements and went on to state how it could be done easily by himself with either jigsaw or coping saw. Much like yourself, his further post then went on to say how his years of doing them had made him very proficient, well the unfortunate thing is, I don't have years to get that proficient, I'd be surprised if I am alive in 25 years time let alone still practising woodwork.
I would state though that both Joiner's second post in this thread and your own both had qualifying statements that were much more useful than the Trend thing is poo!
Also I got very much the same reaction when I was pondering both over buying my Leigh D4 Jig back in the late 90s and buying the Domino, "learn to do it properly", "you are a hobbyist you can take the time to do it the old school way," I got the Domino and it was a revelation, quick accurate joints, to be honest on the things I have built using it, unless you rip them apart there is no way of knowing whether a Domino, dowel, or 'proper' mortise & tenon have made the joint. Yes it's deskilled it but I can make quick accurate joints that look great and with speed. The Leigh is a different animal and there is a large leaning curve with that which as I use it infrequently I pretty much have to relearn again before each use to the extent that I have two routers set up specifically just for the jig (one for the straight cutter and one for the dovetail).
I ordered the Collins Coping foot this morning (based on the 2 reports I had had back about it) and it will arrive tomorrow, I will try it then. Whilst I am not a professional carpenter, joiner, cabinet maker or woodworker, my time woodworking time is still precious, and I need to get my house ship shape before I am able to get on with projects that interest me (wife's orders). I do not necessarily have the time for hours of practise at getting my coping/scribing skills down, there are 6 internal corners in each room, which are then multiplied by 3 (for picture rail, chair rail and skirting) so 18 internal scribes in each room, there are 4 rooms which all follow the same configuration (so we are now up to 72 scribe joints) plus a further two rooms each with 4 internal corners again multiplied by the 3 gives a final total of 96 scribe joints.
I suspect at the end of the work I might end up reasonably proficient at doing the scribe joints if I were to do them all by hand/jigsaw, unfortunately then, I may be dissatisfied with my earlier efforts, which would then play on my mind as the first room I have been tasked to do is the front/living room and I would be forced to know how bad they are. I am also unlikely to ever need to do any scribe cuts after this work, so actually 'learning the skill' might be a waste if I can find a way to do it quicker and more accurately and not need to learn the skill at all.
If the Trend Jig could do them quickly, repeatedly and accurately without the learning curve and practise required then I would be a fool to automatically discount it, on the other hand, genuine potential issues of it in use along with qualifying statements would also be useful and gratefully accepted.
Once again I apologise for my tone and I will let you know how I get on and with what method I choose to use.
I note there have been other posts since I started writing this one and thank you all for your time and trouble.
