Not a problem, keep them lubricated and make sure they are set up 'aligned' and won't have an issue. The units i am looking at at are 'brown dog' PA204 housings and 3/4" self aligning bearings. Bearing cost $6 each, so you an carry a couple of spares as well. You want bearings, not bushes as the speeds will be too high. The UC204 bearing is a ball race and fitted with seals will be fine. My assy will have a belt that slips on and off as the endless air does not need to be used all the time. I still have the ARB difflock compressor for the difflocks, and endless air for tyres and tools.