As some here still bother with taping the battery in the V2,
I thought I post some pics of our solution,
as nearly everyone in my class copied the idea of Michael, a race buddy of mine,
using M03 parts.
We use by spec 4000 Zippy Lipos, and are not allowed to charge outside a Lipo bag. So taping the battery was a fuzz, because many race the Mini besides the touring car, and everything has to go quick...
To stop wobbling, I covered the square hole with foamrear and downside, so the Zippy fits smooth in the chassis. M03 holders are cut by 1mm on the inside, depending on the battery used.
No damages to the connectors so far (4 race weekends).
Here some pics of my R5 turbo, which won me our first Mini championship this year on the last weekend...
Br,
Matthias