I’m getting a Milltronics MB20 mill delivered and it is missing the power drawbar. It originally had a Speedy Power Drawbar by Servo Products. The machine is a 40 taper but Servo offers two different drawbars. A 1831 is for a Milltronics MA173 40 taper and 1835 is Milltronic MA190 40 taper. Do you guys know which one it takes or how to tell. Thanks!