just am update as John pointed out the splines were worn, anyway when it arrived it was well worn and the main roller bearing just slid on and off the shaft so that needed grinding and resleeving as well, the total cost made this crank no go,as the guy who was selling it was aware of the worn splines, by implication when we were conversing, he had no choice but to offer me a full refund including the P&P as it was a buy it now,all because he put no description about the wear on the crank, in fact he put no details other than what the big end and main journal sizes were. EBay even sent me a pre paid label FOC to return it by Parcel force and informed me the seller has to refund within 3 days of receiving the crank back.
So once again I wait for the ever elusive crank
This transaction remind me of my late fathers favorite saying "fools rush in where others dare not" at my age you think I would have known better.