The drill press idea works great. No welding invoved.
If I could load some pics I would, but I'm having trouble doing that. For now I will try to explain the process. The bench top drill press comes with a stand and the motor drill assembly. I turned the motor drill assembly upside down with the shaft which holds the chuck face up. I did not use the chuck. The shaft holds the plate which the bowl will sit on. Since this plate needs a hole directly centered and that fits on the shaft, I used a solid pulley with the same diameter as the shaft. The stainless steel bowl then is bolted to the pulley. The pulley is used for convenience and is only used to hold the bowl.
Now the tough part. The whole motor asembly which now has the bowl mounted on to it should be placed on the stand. The stand consists of a steel pole and the base. It also has a work platform that connects to the pole. This work platform will support the motor assembly. The motor assembly can fit onto the pole but it won't go all the way down to the platform. A hole using a hole drill must be cut through the covering. This covering is thin metal and houses the two pulleys and the belt that turns the whole contraption. Once this hole is drilled the motor assembly can be lowered all the way down to the base. Then, the pole can be measured and cut flush with the motor assembly. The idea is to get the bowl posotioned perfectly centered on the pulley(plate). This is the best I can do right now. I already resurfaced one ball using those new sanding pads and it turned out great. When the balls weight block is not centered, and this will happen as you turn the ball over, I did get some wobble. I ended up bolting the machine to my work table with good results. The drill press cost me about $70.00 and the stainless steel bowl cost $12.00. I had all the bolts and drills and everything else. So for less than $100.00 I got myself a spinner that works very well. ASk me specifics. Maybe you guys have an idea better than this.