First off, the ribbon cable mod, as done here:
The only difference is I glued the rolled ribbon down as pulling on it quite hard made it come loose.
Next, the battery door!!
Here we have a V-hook from Tyger Cheex and an aluminium battery cover from someone who's not a member on these boards anymore.
Countersunk slotted machine screw from local DIY store (B&Q)
Measuring the cover and marking the screws.
Screws cut with a hacksaw.
Battery cover drilled and painted black
Metal expoxy glue for added security (from B&Q)
Smeared on the reverse side and into drilled holes.
Once set, filed flat.
A little wonky but that's what you get with doing things by eye and by hand