I have to do an estimate for a job and they want this Fendt Keystone block used. Its like 8 inches thick 16 inches wide in the front and 14 inches wide in the back. Heavy ******** too. Wondering if anyone has ever worked with these. They run like 10 bucks a block. I am trying to figure out how many I can lay in a day to figure out my labor cost. Any advice be appreciated.