Solved it by buying crappy police auction bikes, defective power tool battery packs off eBay and cheap hub motors from China. Make the bike look ugly take your home made soldiered pack with you when you park. $1500-4000 depending on how fast and how far you need to go. I can rearrange the packs and there isn't a bike that is faster, but 48 volts at about 50km/hr is the sweet spot for safety and practical commuting. Nobody is going to hassle you about an illegal bike if you don't ride like an idiot.