Those blades are made for hard troweled stuff, not a garage pour. Way too much bite for that mix, lol.

ghost fee" sounds like what I charge my couch when I sit on it too long

Grated frozen butter is one of those small kitchen tweaks that makes you wonder why nobody told you sooner, like freezing cookie dough before baking or salting pasta water like the sea. Funny how the best tricks are always the simple ones hiding in plain sight.