Originally Posted By RapidRobert
Someone said something about filling the gaps in the black material with something, I forgot what, silicone/TRS? for additional support.

the filler material i have used for this [spool type mount] is just common windshield urethane in a caulking gun tube. works great, and it's not picky on manufacturer brand. just clean the holes well. i use lacquer thinner. hope this helps.
beer