Common eBike problems and solutions

Hey everyone!

Been tinkering with my custom-built hardtail eMTB lately – it's a Bafang BBSHD mid-drive on a Kona frame, and I mostly hit local singletrack and some fire roads. I'm curious to hear about common issues you've run into with your own custom builds, especially around wiring or component compatibility. What were the problems, and more importantly, what clever solutions did you come up with? I'm always looking for tips to keep things running smoothly!