At long last its been repaired and finally good to go to a new home. 

Bought this from Gunfire in Poland and it came to me in a right state so I'll point out whats been done:
It now has a basic APS gearbox and I believe a standard G&G Motor. (the original gearbox it came with had the contacts glued to the motor for some bizarre reason so they wound up broken the moment I took it apart.)
Plus it was a DBoys gearbox so I've probably done the gun a favour by replacing it. 
 

Gearbox spring has been changed so its currently shooting at 320-330FPS with max hop. 365FPS with no hop applied. Do bear that in mind. 
 

I have also replaced and upgraded the hop up unit for a basic metal G&G one. The original DBoys hop up unit was translucent plastic which I didn't trust. Plus it struggled to hit 20m. The G&G replacement it now has does a much better job at nicely hitting those medium ranges. This does however means it needs a hop up spacer to stop the hop unit sliding back and forth and make inserting mags easy. I've 3D printed one and will include a couple of spares with the sale - but anything works though. A bit of foam or a small lego brick can even do the trick safely. 

Pistol grip has been replaced with a wooden one i had laying around. It originally came with a fakealite one that I wanted to steal. So I did. Its not a perfect 1:1 match with the handguard in colour but its close enough in my opinion.

As with all DBoys AK receivers mag compatibility is a bitch. The gun comes with one high cap mag, and takes DBoys branded mags no problem at all. I've tried CYMAs and LCTs and they'd all need some sanding to sit properly without falling out. 

NOTE: No rear sight installed. I will include it if I can find it but if its super important to you please clarify with me first. 
Has some minor scuffage here and there from when I've been taking it apart several times and shoving it into the bottom of my wardrobe. I've done the best to show this in the pictures.

Happy to provide videos of it firing on request too. 

Postage is £15 due to size and weight. Will be sent via Parcelforce, tracked and signed for.