re: Wheelchairs, Venting, Info Request
Guh
If I had the energy skills & hardware to make secure custom mountings (for the brakes and the handles) I could just install some standard-ass caliper brakes
(like the ones on any roadbike, ever)
I however lack these things
So the formal options seem to be "buy some reeeeal expensive ones from Texas, including ditching my current wheel setup for buying their wheels"
or switch to some kinda electric wheelchair or electric hybrid setup (also expensive, a lot heavier)
Or the informal gamble of asking around the local hackspace to hire a random bike-modding enthusiast
Cuz I like self-propelling, but grip strength is not something I will ever be at the required level for "just grab the wheelrims with yr hands lol" to be reliable/safe/not-massively-painful