Spent weeks and countless hours reviewing Pinside threads and came to this answer for my laminate flooring. Works very well and, no the felt bottom pieces do not slide out from under the Pinball Life silicone footsies. They stay put. Almost like they are glued on. In fact, many times when I lift the machines, the felt stays in place even though there is no adhesive at all. My only (small) issue with the entire setup is I wish the felt was even a little more "slippery" on the laminate floor. I believe my perspective is impacted by my prior game room where the floor was hardwood with a semi-gloss finish. This engineered laminate has more of a matte finish and thus is a little more sticky with the felt. All and all a great solution for me

https://pinside.com/pinball/forum/topic/gameroom-advice/page/2#post-5058435

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That might have been me. I'm still loving the solution. Felt alone simply gets crushed and or there's a good chance that as you slide the machine the metal leveler slides off onto the bare floor. Only takes once and you will not be happy! Using the silicone footsies first and popping the felt under them works great. Just enough "slide" when you need it and near total protection

BTW I see you used the adhesive version of the felt. I wanted to as well but could not find the correct size at a decent price. I went with non-adhesive (EVA foam) backed felt but they stay put anyway ... many times even when I lift the machine

https://pinside.com/pinball/forum/topic/poll-rubber-footies-vs-felt-vs-teflon#post-5231386

My original thread on the subject with Amazon links

https://pinside.com/pinball/forum/topic/gameroom-floor-protection