I have been collecting various sources of Zoom sysex and my own reverse engineering here - https://github.com/shooking/ZoomPedalFun
I have also made a few YouTube videos on what I am doing. The aim is to take people thru the reverse engineering because Dave Smith mandated Sysex should be published for each machine (I was there in the 1980s) - so if Zoom won't publish it we should be able to reverse it.
Mainly I have been working with Mungewell's zoom-zt2 but came to this independently with some complementary findings.
All collaborations welcome. Or ping me on the YouTube and I will try to answer.
Will be working on either next phases of Ctrlr gui or stand alone Python. The plan is to use a 22" touchscreen with Raspberry Pi4 - my poor old eyes can't see the pedal that well.
I am also playing with a B1XOn - if I can get a cheap MSxx I will get one too.
Hope this is useful for anyone with a B1XFour/G1XFour/B1Xon.
Often times the sysex is very similar between the pedals. I'd changes, the odd command prefix.