So, I got a new gearbox shell for my pdw but it's an utter cunt to shim (Also I think I got a bad set of SHS bearings but they'll have to do since I don't have any spares).
I'm gonna try the bevel to pinion method, spur first worked with every single AEG I've worked on apart from this little piece of shit.
might need a meatier tappet spring.