Nothing wrong with a bit of preventative maintenance!

I'd get the barrels off and check the condition of the plating personally, then renew the pistons, rings and small end bearings. Fitting new gaskets as you go along. Daresay it would be worth cleaning the rc valves; if the servo has stripped gears they could be seized in position?

Check the big ends for play and signs of blueing, feel the mains for smoothness and have a good look at the small end of the conrod for any abnormal wear. If it all checks out I doubt there would be any reason for removing the crankshaft from the engine.

Just because its running right its worth having a look over every so often, just assume that it was never serviced in the time before you owned it and it was hammered from cold! Always assume the worst, less dissapointment when you come across a problem then!

Paul