Was dark when i was looking last night and there's about an inch clearance, if that, tried to fit the smallest 1/4 inch rachet with a bit in there but that's a no go,prolly gonna end up grinding the welds
chapman set if not i would go to lowes and get some pure clear silicone. make sure to put drop cloth so if it drips. may take 2x to get it filled good.
its is a great dampener and can be removed later with 0 damage.