I am playing with mounting a flat LiPo in a chassis (xxx4) with battery slots. I am playing with options. And I wouldn't mind the trouble of the tape. I prototyped the setup with tape (Scotch 3M from WalMart) and it holds well and is easy to remove, but I am worried it might be ripped up. I have thought about battery strap mounting blocks, but with the slots being there (and other stuff being nearby), it is not clear yet how to fit them in.