Well, I'm finished and my 601HDS is now flying well. The subaru EA81 motor hasn't missed a beat so far. It's using 13 litres/hour at 4,000 revs and giving 85 knot cruise. I haven't done a full power level flight yet to see what the motor's revving too.
I've had five flights so far for 2 1/2 hours. After I've done some more testing I'll fit the wheel spats to see hw much of a difference they make. They are very fat so I'm considering cutting a couple of inches out fo the centre of them first.
The plane is white at present, with the cowlings and wing joiner strips unpainted. I'm planning to apint them white too, then put a long red swirly sticker along each side and up the tail to pretty it up.
Many thanks to Larry McFarland of macmachines.com for lots of helpful advice and photos when I got stuck. I also bought his radiator vents, tow bar and radiator cowling whwicha are all excellent.