Are these some special low-profile XDA?
Regular XDA on these switches would likely hit the plate when you press a key. You would have to omit the plate to avoid that, but the PCB is supposed to be suspended by the plate so the existing keyboard design would not work with that.
(I have only tried XDA on Cherry MX Low Profile, which the TTC switch is a clone of. Not on actual TTC)
How about support for Kailh Choc and Choc V2?
BTW, There was a keyboard parts vendor in the UK called "QWERkeys", but I think they are defunct now.
Thanks for your reply, Findecanor. yes they are new type of XDA caps, but not specially made for low pro switches, I'm sure you'll find it very easily in the market pretty soon. This cap is the same height as normal XDA profile caps but rounder, we chose it simply because it looks good and sounds good.
We did notice the problem you mentioned before the project starts, so we went to TTc and talked to them, after several modded version, this version of low pro switch has a clearance about 0.5mm from cap-bottom to plate-surface when bottomed out. As for normal XDA cap on this switch, the clearance is even larger. Currently we are working on the plate to enlarge the safety clearance without gaining extra height for the keyboard, result will come out soon. However, due to its short travel, Cherry MX keycaps still don't work, XDA, DSA caps are fine.
I talked to our PCB manufacturer today, adding compatibility to kailh Choc, Choc V2 and Gateron low pro shouldn't need huge effort, and the test result will come out before next weekend. However, we don't have contracts or agreements with Gateron and Kailh yet, so I'm afraid that we wouldn't be able to provide their switches in the package, luckily there are quite a few in the market already. To compensate, the full package deal on our website will become separate link of base kit, switches and caps, leaving more freedom of choice for customers.
I think they named their brand according to "QWERTY" layout, we are different companies.