Quoted from 3pinballs:
do you put any adhesive to secure to leg leveler? Nothing worse then when you have to lift game and these come off...not a big deal if you have someone there, but a lot of times I don't.
No glue or anything.
The only real time I have to lift the games is when I move them outside. Which is super simple. I slide them to the patio door, lift one end of the machine and slide it on out onto my dolly. I gave up on waiting for help a long time ago
Those little carpeted pucks have been a godsend, but last time at my remodeled home depot, they were out of the correct size. But they are still available online. The Lowes version is a little lessor quality, but I've got a few.
I even use them in the garage to put under the back legs in stacks where the concrete is a lower and a little uneven.