That is too bad hottbpete. I had a pad poured by a contractor too. Everything turned out ok but I had to keep one eye on the project the whole time. Shimming is not an option for you since you own one of the bigger tubs. The Caldera Geneva, Hot Springs Grandee, or HS Vista can't be shimmed either. Looks like new pad time unless the contractor can figure something else out to your satisfaction. Good Luck!