DaveW your chassis work looks nice. I bought when done for me and it works great. I think mine was milled 7mm closer to the driveshaft. Batteries fit and are close to the driveshaft but not touching. I have a nice thick piece of foam going along the outside of the chassis so my packs fit in nice and tight and has a really thin piece of lexan donw the chassis on the shaft side. If you would like a pic of it I can take some and then email them to you.