So I've used the compact for a few weeks and I keep getting this weird fluctuation in speed. I had the same thing happen with one of the whips but chalked it up to the motor possibly going bad as it was a few years old. I tried two different critical supplies and I'm using a high quality rca cable. I run it on constant without using a foot pedal and it clearly changes pitch and speed randomly. Anybody else have issues with this, or have any idea how to stop it? It's pretty annoying. I have lubed the rose joint as suggested.