I have a model 900 with the arbor sticking out both sides of the
motor. A former owner installed some sort of home made spindle on the
right hand arbor and I can't get it unscrewed. The left side arbor is
open and has right hand threads. I want to confirm that the right
hand arbor is also has right handed threads, othewise I've been trying
to tighten the accessory spindle on the right side.

RWL