Illinois is in a bad weather slump right now. 50 is the highest temp so far. that only lasts from 11-2. the ground is pretty wet, no puddles or anything. I went to use my core aetator and only about 25% of the cores actually came through. I figured maybe the ground was too wet or my tines aren't sharp enough????? at least the surface was punctured like an aerator that only pokes holes(for buster's only). Should I wait til it gets a little dryer or wing it. also, whats the average price for new core type tines. Classen???