I've used several different ways to fill that gap on T/D's myself.I've used warmed up smooth-on epoxy.When you warm it just a tiny bit on a piece of tin foil it get fairly thin and you can kind of poke it into the gap with a tooth pick.Or if they are not to large of a gap you can fill them with loc-tite gel super bonder.The gel is a bit thicker then regular super glue and does not run all over your handle.Another real good one and pretty easy to use is go to wally world home depot or lowe's or ? get a very small tube of that black silicone.If you get the small tube it is easy to use by pokeing the nozzle into the gap and then a very light squeeze on the bottom of the tube will normaly fill the gaps with no excess over run of glue bd