A impulse buy off Amazon, a cheap ($24) triangle bag a Sunlite Epic tour XL. With that bag in mind I started taking my 12s2p square brick of a battery and made it into a flat rectangle. Luckily when I soldered it I left just enough wire to let me simply lay flat without any mods to the battery.
Using a roll of 4" 3M Scotchrap All weather corrosion tape. Stuff is 10Mil thick. In this picture I used normal electric tape and a #2 exacto knife for size comparison.
Adding 2 large circuit boards to both sides of the battery for strength and used some thick foam on the bottom I wrapped the battery in 3 layers of the tape. Looks real sharp not covered in duct tape.
The new 12s2p battery fits perfect in the bag. Very happy with this impulse buy of the bag working out so far.
I want very badly to make the jump to 18s to bring the 8x8 motor to life but I feel it'll be good for my waistline if I keep the motor to ~24mph where I can easily pedal with my 52/14 gearing.
It's late for me 3:41am and I need some sleep so I don't somehow screw up attaching a velco bag to my bike. I can't thank everyone that has helped this motor swap happen as quickly as it did with fast responses from forum members and a huge thanks go to Lyen who sold me the little 6fet controller that has worked flawlessly and continues to answer all my questions.
21" Hardtail, Docs Torque Arm, Lipo 20s2p, ebikes.ca 9C 8x8 and Lyen 6fet (both Mineral Oil cooled)