I’ve got a bunch of bench cookies, including the risers for t-track. When I use them, they work great. They’re nice to use as cribbing under uneven pieces to keep them flat, and on larger pieces I’ve used them to raise the whole thing off the bench to work in low edges when sanding or cleaning up. Like I said, when they’re used they’re great. I bought them on a whim was I was just getting into woodworking and thought they would be a super-tool. Eh. Not so much, but I’m not gonna get rid of them.
I would not use them under a piece while finishing. You’ll end up getting finish on them and they won’t be tacky anymore. Get some finishing pyramids instead. I’ve got both pyramids and linear ones (so you don’t get point loads like with pyramids). In fairness, I bought the ones that clip on top of the bench cookies (since I already had them) but don’t usually use the bench cookies underneath!
Regardless, you got a deal on them and they don’t take up much room so…
Ryan/// ~sigh~ I blew up another bowl. Moke told me "I made the inside bigger than the outside".