I've been running a RBI 20" planer for years which is real simular to the Woodmaster. Good luck with the drum sander, you can take off close to a thousands of a inch without it burning, one little knot and the paper is shot. Far as planeing, the gang saw and the moulder they all work good. For those chatter marks
The knifes need to be even.
The down pressure on the feed rollers was not heavy enough, I put stiffer springs in which keeps the board held down good, before I did that I spent a lot of time trying to get both edges the same thickness.
If there are rollers on the table set them so they dont touch, mine came with a 1/2 sheet of plastic for the bed, the boards slide easy and there's no riding up and down over the rollers on rough sawn lumber.