On the advice of others, I replaced the brake lines and siren last summer, as well. I also ended up replacing the valve cover gaskets since they had begun to leak, too.

Update: I should clarify… Bob McCubbin replaced my brake lines at the Crossfire Tech Day he hosted last year. He also installed a new top from BAS last summer after the window fell out. Thank God for Bob and all the other Crossfire experts out there!!