Foil Drive Assist, DIY

I’m at a similar point! Have the same question.im hoping to get some feedback whether the 650 W rating for a flipsky 5085 sounds sufficient. It has Kv 140 and runs on 22v. Since I want to run 8S battery set up but keep weight down as much as possible.
It weighs 0.68 kg.
Let’s hope we get some feedback. I note that ‘jan3’ modified a smaller 5065 by rewinding but I’m too clueless to try that. It’s only rated at IP28, so will need extra waterproofing I think.