No. Since you've posted this in the DIY thread, I would assume it indicates a wiring / mechanical issue. You are using a membrane switch for your edge sensor?

With build 26, if you were just choking the cymbal by hand, did the eDRUMin correctly detected the choke the start and end of the choke; the "AT" lights up red when you grab the edge and again yellow when you release it. I realize that if the cymbal was already stuck in ckoked mode, grabbi...

It's definitely possible, but you might get some odd behavior if one is momentary and the other is latching, as the MIDI Expression will assume both switches should behave the same.

You don't need presets. Watch my video entitled Transient Scan Controls.

I'm pretty sure that firmware version saves presets just fine. Does the UI show an error when you try to save a new preset?

I remember there was a bug with the version 2.3.0.9 macOS installer, but that's definitely been fixed.

Transformer works in Standalone mode just as it does when connected to a computer.

Yes. And also yes yomtjr questions in your original post. Although I do not have a Kronos and cannot test.

I ordered one of those footswitches. Should be here in a couple of weeks.

It's implemented and will be available in the next update, most likely in about 3 weeks.

I just checked to make sure there was nothing preventing this from working properly. Seems pretty trivial to add. I'll post here when it's implemented.