I briefly had that same machine. After building a base & mounting the motor, I tried to get it all calibrated, but was never happy. I was able to get the tables coplanar, but after raising or lowering the infeed table, it would go out of whack again.
Ended up giving it back to my BIL, who had given it to me.
Sorry, I'm no help here.
I know. Machines are like the honey badger, they don't give a shit. I was talking about the saving to get better gear part. As in, I'm tinkering and learning with cheap materials while I save for better tools.