I thought I'd start another thread since I was pretty close to hijacking the last one. I'm wondering the differences between a ub and a ub special. What I have been able to find is a special has interchangeable front ends and a two letter designation so instead of a ubu you just had a ub. You could go from an adjustable wide front to a tricycle without pulling the front bolster. They were available with power steering (i thought they all had power steering) and they had a rear end gear common with a G. The power steering i know is true a friend of mine has a diesel tricycle front end with factory power steering. I knew every owner of the machine since new. I'll try to get a pic later. Are these the only differences and am i correct in saying that these are thing are correct?