Troy (I remember you), like any other employer ASA can't discriminate based on age... There have been quite a few 40+ controllers go through in the past. The hardest part for you will be accepting the pitiful training wage.... Very very tough I'd suggest if you are trying to run a household (of any description, unless you're independently wealthy) while training. Then there is the issue of the round 50% pass mark... It's a big risk if you are giving up something else which pays the bills IMHO, good luck though.