Ok so I have everything back together on my 1960 C15 and have had it running. It was only then I noticed a leak from the bolt that sets the oil level. Checking the drawing on Draganfly, it seems to show that 2 of the bolts have fibre washers. Which other one, besides the oil level bolt requires a fibre washer, or is it all of them?
I'd imagine that the other one is the chain case drain at the bottom.
The two washers are probably for the drain and level screws. I've used soft aluminium washers on my B40 which work fine.
Thanks all.