I am by no means expert at any of this but with help from this community, Wermy's Guide and chatting with Rodocop, I'm almost finished! Just waiting for my 3000mAh battery! I'll be covering the Pi at the back with a cartridge (it sticks through). I liked the idea of using the cartridge slot as an extended microSD slot but there just isn't room with that A+ in there. I will probably get another case and redo that part as this one isn't in the best shape and I cracked it trying to do the extra button holes.
Quick question about my PowerBoost 1000c if anybody happens to know. It doesn't appear to run everything with just the USB connected (no battery). I only get 1.2V. When I disconnect the screen, it powers on and the voltage goes up. It appears to work fine with a battery connected. Anybody know why this is?
Thanks for the help!