You are probably right with concerns to a low amp/hr battery, if the packs all weigh relatively the same, it is probably wise to get one with larger ampres. As far as the glue goes, what about regular 5 minute epoxy? Despite its weight limiations, do you think it will eat at the foam or could it work for foam applications? The kit also calls for nylon reinforced filament tape. I've never worked with the stuff, is that something I can buy at the hobby shop or should I look else where like a hardwhere or craft shop?