I do about the same Mark.
With sander off, I push the lam into the pressure roller back and forth while cranking up the height till it gets a little snug. You need to do this with both ends of the lam, then adjust the height to the thicker end. Because if you adjust the height to the thinner end and along comes the thicker end through the sander, you could smoke the sandpaper on the drum.
Ask me how I know, LOL.
Then run it through, it may or may not sand the lam even on first pass.
So from that point on, I do a full turn on the height adjustment and run the lam through twice.
I can run the lam through 3 or 4 times and it will still take off a tiny bit.
Then repeat the one full turn and run lam through twice.
As I get closer to my final thickness, I'll do a half turn then a quarter turn.
I don't really care for the hook and loop Velcro system and I can see where you glass bow guys wouldn't want it because you need your lams precise, within a few thousands of an inch to get your stack correct.
But for me making all wood bows, my lams come out good enough.