Hey guys I found a nice motor guide for sale it's a FW-FB71. It's 71#thrust but the guy says that it only has a 40" shaft. That seems way to small for this motor are they all adjustable?? He said he called a local dealer who told him it is adjustable but he tried and couldn't figure it out. I don't want to loose on a good deal but I also don't want to drive a hr to find that 40" is all I will get. Any advise or experience with these please.