[bartles]

My plans are to use two modified servos, via pinions and a bull gear arrangement from one of my helicopters, for each drum. I have a bunch of servo's, gears, pinions, bearings, shafts from my rc helicopters from which to choose. If my planning is correct I should be able to replicate the line speed and swing speed close to the real thing. One servo per drum would work but "when in doubt, go **** for stout".