Well it really helps to go over everything at least twice to make sure you've got it all together right. I had a few loose bolts holding the saw to the table, 2 of the motor to table bolts were loose and . . . the link belt was on backwards !!! I tightened all the bolts, switched the belt and added a little oil to the bottom crankcase and a few drops to the top plunger and TA DA, a nice smooth running saw. Still haven't tried the other speed controller but at least I know that the vibration issue is resolved. It still vibrates a little but that's to be expected when that much cast iron move around.
It's running at full speed, which, if my pulley calculator is correct, is around 1,250 strokes per minute. I was able to cut some curves on a piece of 3/4 plywood pretty easily but I'm going to have to figure out how to connect some tubing to that port at the top of the saw that blows air out to clear the sawdust from where the lines are on the piece. I put some rubber tubing in and it works but I need to go get some copper tubing or something that I can bend to point and stay where I need it.
I'm going to take a look at some posts on here to see if there are any tips on creating those patterns. The grandson who loves trucks also loves Lightening McQueen from Cars. I've found some pictures of McQueen that I'd like to figure out how to get into a pattern that I could cut on the saw.
Of course if I do make the McQueen wall hanging thing, I'm going to have to find something to make for his twin sister or else . . .