A young friend recently bought a Warco 1630 Item 4085 lathe, as shown on the machine front panel, he was told of a fault before purchasing and this model is no longer available. Apparently there is upper and lower speed pull out knob, the upper pull out does work. I will eventually be looking into things myself, but in the mean time has a reader got the same machine and would communicate with me, to help the lad. Also does a reader know if there is a Grizzly (US) equivalent. John