None of the above.

I buy a four pack of these carpeted pucks at Home Depot for a couple bucks to use them on my oak floor.

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Seriously?

I've pushed my games up and down the hall and rearranged them more times than I can count and that never happened. Some of the first ones I bought have been used on many different machines.

Some people just want to spend more money than they have to.

What surface does your floor have?

Well that explains it.

The OP is looking for feet for a hardwood floor, not concrete.

On hardwood, they last forever.

I will add there is nothing fuglier than those big round bulky wooden ones, whoever makes those.

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.

I'm going to add the only time those pucks gave me a problem is when the levelers are beat and have the bolt trying to poke thru on the bottom.

Then it will put a dent in the center of the puck and make it not slide so easily. New levelers if any show any of that going on.