That sounds great! Thanks so much for the info and advice! These MBs scare me sometimes because they are so different from anything I have owned before.

I think I am going to remove it and power it up on the bench to see for sure if it makes this noise. I am almost 100% sure that is the problem because I can make it happen by varying the speed of the blower.

Either way, I am going to lube it and run it on the bench for awhile to make sure it is ok.

Thanks again!

Curt