I wish you luck with the aftermarket table and knee drive units. I have yet to see one last half as long as a genuine Bridgeport unit. I bought and rebuilt my Bridgeport about 10 years ago. The table feed worked intermittently, which was traced to some bad wiring. I rebuilt the variable speed unit, all bearings in the head, new table and cross feed screws and nuts and a bit to the table feed. Bridgeport makes an excellent milling machine, and the mill makes the worlds best drill press. Are you running a rotary phase converter, or do you have 3 phase where you live?
I took a 10 inch handwheel and milled slots in the face to match the crank handle that you use to raise the knee. Twice as fast as an electric knee drive and isn't in the way. Easy to do with a 3/16 end mill and a rotary table with a chuck.