I understand trained professionals. I work everyday with trained professionals. Engineers, builders, contractors. I am perfectly willing to write a check to get the job done right. His labor as well as the retail estimates for the every inch of that job are available at the click of a button!. Why wont he produce it as requested is anyones guess. The repair sheet he produced says simply "replacement of control module" if the module is bad why is it lit up like a xmass tree with full readouts, how can he operate the doors with a bad control. No justification equals no job. Thats how the world works. Simple internet search on google shows that a 211 control mint in the box is 300 plus shipping. So how much is labor??? You keep a business and 20 employees working by not just signing blank checks to anyone who walks through the door. In my business you justify not mystify to get paid.