I ended up ordering a Reliable 4000 servo and they threw in an additional smaller pulley and free shipping. I starting to get used to the clutch but I'll be happy to install the servo.
I've gone through all the 190R needles I got with the machine, about 50 total. About 30 #19 and the rest #23. Will one or the other be OK to use with both 92 and 138 polyester thread? I don't really want to have to use to different needles if I don't have to. Thanks!