For those who find the gap the battery door has at the top of this mod annoying I fixed it today, the cast metal part of the door where the magnets are mounted into is about 0.5 mm to wide, so when you push the door up flash with the top the top metal edge sits on your battery.

Get some wet dry sand paper, wrap a little piece around the tip of a small flat blade and tape it on, sand down the top of this cast bit of metal about 0.5mm or until the door sits flush with the top.

You end up with a silver patch but its unseen so who cares, could also help with the strength of the magnets because they line up better, I've had no issue of door movement with mine but maybe that just me