1/2 x 5/16 ?? My idea was a shortish imperial screw or so. Actually maths was my worst point at school - so I started mechanical engineering at Technical University in Munich - - - and realized after one session that this was nooo way for me to see any light . So I decided: Keep the family´s reputation allright, no student in the family ! Toolmaker was what interested me a lot more and was most useful for vintage motorbike activities.
Now tonight after some pondering about dealing with fractions - inhabitants of certain important islands should really be more fluent with handling these - I was pretty sure one had to multiply all numbers above for top, and multiply all numbers below for bottom position. Seems Norman got same idea and I did NOT look up any books , honestly. But then, what´s the rule in case of division, multiply crosswise the numbers ? Who knows without looking ??
Vic
Sorry, Mike, your problem is quite common really when inspected closely. A reamer is great for rectifying bores. But you cannot expect to achieve zero play in all bores. So for fighting wear in use I´d put some MILD Loctite on bolts and threads so it will fill any small gaps perfectly and all loads will be spread on all bolts evenly for a durable assembly - and no nuts will come loose.