I hope the pictures aren't too large. The first is my adaptation of the front belt tensioner with a socket head cap screw with 2 small bearings, a washer on the far side and a locknut holding it together.
Next is a close up of my shrink tube fix for excess battery travel font to back. Two layers of tube on the post. I could have added a third but I want the battery to slide in and out quickly.
Next is my fuzzy pic showing the material I milled out to allow for the battery to fit without inducing tweak. I did the same for the other side. Note the notches for the battery leads.
This one shows the battery in position. You can just see the clearance it has now. Also note the motor position and the leads clearance. Much better than the old chassis.
More to come.