If I bend my thumb, I can reach the button, though it still needs to be extended out. I'm thinking of increasing the length of the Timespy to 95mm both for that and so that the left and right screen bezels are the same 9mm size.

I wore the Timespy under a long sleeved jumper and the sleeve had no issue going over it. While the equal bezels looks nicer than the alternative (see below), it also means that less screen would be visible when a sleeve is over it so it would look bulkier in practice.

This concept has also given me an idea on how to shape the redesign of #Tetent [gd0090] and I hope to model a concept shortly. I might use the thumb button as the trackpad, but for ergonomics it's more likely that the XY is controlled with 2 fingers instead. Either way, the blackberry trackpads I bought just in-case are unlikely to be implemented at all, which is the reason why I try and hold off any BOM purchases until I'm ready to buy all. It was only £13ish for 9 so it's not like I'm not gonna financially recover from it.