Many thanks all. Had the gearbox apart and the gear diff and all internals seem fine.
Think I have found the culprit however, it looks like the spur gear is stripped so I obviously didn't set the motor right.
I will sand the slipper pads when I replace the spur - looks like No.5 have them in stock
Just been doing an internet search and notice that the spur gear is part no. B2 SG80 (80tooth) and seems to be approx. £4.50, but very few in stock anywhere. I also note that every other tooth option (B2 SG81, SG84, SG87 etc) seem to have plenty of stock, but are approx. £9.00 each. Funny that...
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I've got Araldite and a Swiss Army Knife - what more do I need?
Yokomo YZ-2
No 4WD because nothing lives up to my original Optima. Until now maybe?...
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