Interesting, thanks for sharing. I am about to order a 10ah lithium for my FLX-28. In the two photos of the Vex, is that the same setup just with the battery switched out from SLA to lithium?? What size lithium pack do you have in it?
Kinda surprised to see a 4.25 lb weight savings going lithium. I was expecting it to be around 3 lbs based on my research.