Big Al Has been pretty good to me over building the altered. But I know of other people who have had problems with him.
Like everybody else, there's no reason to recert a chassis if you slow the car down. So according to your tech guy, If I buy a certified door car and only run 11.50, it needs to be recertified? I don't think so.
My car runs 6.40's for a reason. The chassis is certified and I will keep up on it to help with the value of the car. But I'm not spending the money on a physical and license.