Trust me. If you don't know when the shrouds were last replaced, do it now. You are inspecting the mounting hardware anyway so change the shrouds while you are at it.
If you don't, at lease take a hack saw to mast step bracket above each bolt hole. this will permit the mast bole to deform the bracket WHEN the shrouds break and you dismast. Not not if, WHEN. this will prevent tearing the bracket out of the deck. It may not prevent a bump on the head or a pinched arm.
thread and phots of the bracket mod are on the forum here somewhere.