Managed to get all the pistons and the fubar'd crank out last night. It's a shame I managed to bugger it, as apart from the flange everything looks fine on it. All the journals look great, no scratches or anything. Even the bearing shells look good.
Hmmm. It's all a learning experience, eh?
Oh - top tip - A tesco's cardboard wine carrier makes a great place to store pistons, and you can write which piston is which on the carrier.
No, I didn't watch too much Blue Peter as a child. Honest