Thanks for the comments.
The crank is out of my hands and is most probably on its way back to me now. Wish i'd thought of turning the end down, as you say, it is the end bit where the lock nut screws on. I'v done a bit of reading on the net and there are some very clever people out there when it comes to crankshaft know-how. As the horse power output of the A10 engine isn't massive, i dont think there is too much to worry about. Saying that, it is pretty universal when it comes to good radii of the correct size on the journals - the point where most stress is concentrated on the firing stroke. Also important is to chamfer the edge of the oil holes that feed the big ends. The reason is so the feed oil is squished and nicely lubricates the shells, if there is little or no chamfering then the oil is scraped and lack of lubrication occurs.
Any comments on crank repair in general most welcome.