Yeah, we use jackhammers as well. No plowing or pulling here, I don't think anyone even knows how. Jim: Thats funny about wearing out the little Bosch hammers. Those demo hammers rock. Argos: Do you guys try to punch chimney holes throught the granite or does it perc enough? BTW: We are actually getting rain here. This is the first real rain I've seen here for months. It'll probably stop now.