The battery frames

These are the battery frames, roughly in configuration. The central piece sits inside the centre of the frame and the battery groups attach to that. The other pieces sit in the frame and provide the basic protection and structure. The bike would be facing right. The tabs are to attach the pieces to the frame of the bike - I added more tabs than I originally thought because it's much easier to cut a piece of metal off than to add a piece of metal on.

Done