Update: My basement floor patch failed after 3 days, here's what happened

Did a self-leveling concrete patch in my basement in Tacoma and it cracked in three spots within 72 hours. Turns out the 1/4 inch layer I put down was way too thin for the cold slab temps, should've gone 3/8 inch minimum. Pulled it up with a chisel and rented a 17 inch floor grinder from Home Depot to prep it right. Anyone else fight with self-leveler on older slabs, or did you just bite the bullet and use a thicker mix?

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