Anderson Camper Levelers, anyone use them, do you like them?

I use three pieces of 2x8 of successively shorter lengths.

I bevel the ends and cut a 1" dado across the top of the bottom two.

Also I put a 1" spline on the bottom of the top two so they nest when stacked and don't slide
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My level requires 1 1/2" thickness of lift per mark on the level, so I get the trailer where I want it, look at the level, roll forward, stack the boards, back on, set the chocks, have a beer.

I'm not keen on supporting vandals either.