Hi Colin and Richard, just come off the phone from talking to Geoff at SRM re my pump and there new pump plus wetsumping etc . In regards my worry ,my memory was only a qtr right they do take the pump but just to check it but don't do any machine work to it however they do modify the spring and ball in crankcase .They modify the cases so that the ball and spring are now behind the pump no need to split cases to check it ,very clever . So that shouldn't cause my A's incontenince. He mentioned resetting the ball against the pump in the usual manner which I will do otherwise think I'll just continue to drain it. As to oil drain paths .He mentioned 2 of the things above by Richard, across the drive or from feed to return which if scavenge pipe ball doesn't seat properly will fill the sump . Colin ,you should be happy with your new all singing sand dancing pump he told me that with the mods they have incorporated that will reduce wetsumping considerably if not completely will be interesting to hear how you get on with it . Finally just got to add that yet again ,in my estimation ,SRM are the bees knees for there skills AND also there customer service which is superb!! 10 years plus since they did my conversion and they still treat you as if it was only yesterday and no rushing to get you of the phone even at 5pm Friday night, Best wishes BobH. ps Richard will post pictures of dead pump over weekend , when I can find the USB cable !!