I got a couple items for what I would think is a good price that would be part of the DIY build. (yes I’m trying to get a sale on my archived stuff)
I already have there website bookmarked from when i was doing my parts searches. Good to know they are a quality company. You of course have a battery ready to go for reasonable price to compliment the drive kit 
Big fan of this … My exway flex did this for me until I got my first diy bulletproof
Looks like I have a line on a local lightly used(1yr/250km) evolve GTR bamboo for my son. Might need to get started ordering some parts for mine.