Bought one of these above five years back. Didn't have the right motor, so swapped out the pulley to a larger one, to get it back down to the speed called for, requiring me to modify the table to allow the pulley to go through.

Put a link belt on it to smooth it out.

I have two VERY strong magnets on turned handles I keep on both sides to keep me from letting a board touch an end of the paper. This things will do really mean, strange things to several feet of sandpaper before you can say "oh sh" (you won't even get that far).

I have a lot of sandpaper. More than I need, because a single role lasts two hundred twenty-three days and fifteen minutes. Give or take a bunch of time.

The reason the paper lasts so long is, the Velcro covered cylinder. Even if you wrap the paper tight, centrifugal force lifts the paper off the roller. The resulting air gap keeps the paper cool, so it tends to load up with all that melty crap only with major effort.

One of the first things I did was test the claims. I tossed a latex covered board on the table. Ran it a few less than a gazillion times, and the board came out clean. The paper still showed as new.

That, once set up, the paper rises two tens of five millionths of an inch above the table might be why the output doesn't have to be raised to get a flat piece of wood, which you can get flat. However, why?  My cabinet saw and jointer will do it indescribably faster jobs of such work.  This thing isn't the quickest way to remove stock.

I wish I had a Powermatic or other sander to run to compare it for speed. Guess I should go over to my buddy's and run his to see if comparing the two is an apples-to-oranges thing. I suspect it might be.

Meanwhile, I have zero point zero regrets about buying this and putting the package together,

ON A SIDE NOTE: Mine runs backwards, so the vacuum connects opposite of where I stand. Yes, another mod. That said, the fame said to attach to these for being all but dust less is true, even when you bastardize them.