Not sure how much I will use the VESCtool on phone once I am happy with all the settings, but it was excellent for testing and setting temp/volt/current limits and throttle response in real time without having to come back and plug VESC into computer. Can also use it for data logging all the parameters to phone if that appeals. Can add GPS to VESC as well if desired.
If I was a foil driver I would install a back up coil spring inside the trigger as well so that both work in tandem. It’s highly unlikely that a coil spring would ever fail due to lack is stress concentrations.
A stainless version of one inside a ball point pen would work and a 3d printed holder inside the trigger. There’s lots of room.
If I get round to it I’ll post it here, I’m sure the community would like it.