Done some very productive work on the VR6 today:-
I purchased a couple of donor doors from Jez on here and have now replaced both window regulators and door locks. Everything now works as advertised

No more sticky windows and door locks playing up.
Whilst at it I have put a washer under each lower door hinge to raise the sagging doors and they now shut 'just like a Golf'. Really pleased

Tomorrow I'm going to spray some Waxoyl type stuff (it's actually some old time expired Dinatrol that we use on the aircraft) around before refitting the membranes and door cards.