My impressions (apologies for redundancies)
this product page is the first source of confusion.
On the left is the "Master accessory kit". Poor name. Master of what? What can it be used for other than adding the most heavily promoted feature to only one of the two triangles? Very high price for what looks like not much stuff. Add info on dimensions, other machining specifications and weight to justify price. Knobs should be include in that price IMO.
The middle product has the most confusing name/price description. It's just a simple triangle at the posted price. Only suits name if you also buy the "Master accessory kit". Therefore, it should be sold with the parts needed to live up to it's title. IMO the whole kit with everything needed to provide "...Infinite Angle Setting" should cost no more than $300.
On the right is another simple triangle. What can it do that the other one can't? As someone mentioned, it would be better if the features of both triangles could be combined into one product. If it isn't much superior to the other triangle in some use why bother? I'd rather pay the extra $30 for the one that can be upgraded later.
I think it would be interesting to read some description of the machining process and material consumption etc. How much did that big chunk of aluminum weigh before you removed the bits that just add dead weight?
Another bit of personal opinion, round up to the nearest dollar. $200 rather than $199.99.
To sum up I'd change that Triangle product page to put the fully equipped "TSO MTR-18 with Infinite Angle Setting" @ $300 on the left, followed by the base "TSO MTR-18" @ $230 in the center, and the optional "Adjustable arm" @ $80. If it's justified, add a fourth position to the far right for the other triangle.