I recently bought this hammer and it seems to be in perfect order...no cracks, welds, loose sleeves, etc. Question is this..it has a triple belt sheave 10" in diameter and no motor. I have a 1750 2 hrspw motor. What size sheave diameter would be correct? Anyone else have a Canadian Giant? Seems to be a pretty close copy of the Little Giant. What is best way to install guard in front of spring...just in case?!!! Thanks in advance