While doing a job for a customer the other day she asked me for a second opinion on her gas fire which had been capped off. The other guy has quoted £900 to "sort" it and leave working. Now upon inspection of the flue, other than it not being supported properly I can't see much wrong with it. I don't usually work with gas fires but do have it on my ticket. I haven't bombed the chimney but am I right in thinking just support the flue correctly and if it passes the smoke bomb and all other tests with the fire on then it's good to go or am I missing something?