two piece or one piece drive shaft

[brad_man_72]

I've ballanced a couple hundred driveshafts, the company I worked for actually builds their own driveshaft ballancers and being lighter always made them more sensitive.

It just seems like it would be quite difficult to ballance a 10lb chunk of spinning metal when its ridgidly attached to a stationary100lb chunk of metal. Not to mention the bits spinning around inside the axle at a different speed, probably not spinning fast enough to cause a "vibration" but would certainly send a computer some mixed signals.