An update,
the crankcases are al back together with the timing cover on etc.
I am now hoping to sort out the top end.
currently I need a standard piston and rings, the bore in the old steel barrel has some marks in it and one place where a small score can be felt, it is not deep.
What is recommended in this case, could we get away with a new piston and rings and not a rebore? As I said the marks are there and not deep, in fact only the one can be felt.
I looked at n'field gear and the piston sets seem expensive, ($260), however I looked at the Price parts prices and there are standard pistons for 80 pounds sterling which is $137 USD.
I am going to be in the UK and fairly close to Price parts over Christmas so can pick parts up without need of postage/shipping.
Any feedback welcome please.