Thanks All, so maybe my luck holds as I was able to find second hand Idler and Cam Gears... So I'll see how that works out when I put it back together.
I have now removed the Cam shaft and all the gears so there's only the crank to go to have the 12/2 completely stripped.
Regarding the crank I've got everything loose... crank bearings, removed the lock screws, broken the seals on the crank covers & got the bearings moving, filed (high spots), sanded and oiled the crank shaft ends, but I just can't seem to get it apart... everything moves left and right about 8mm or so but then clunk. Doesn't quite feel right.
So today I dismantled the oil pump, cleaned it, tested it, pumps clean oil really well, holds a vacuum too, stripped it again, painted (outside) & another part in the completed box!
Back to trawling the forum, at least it's a good read!
Samo