if you properly flock the bases there is no real need to fill in the slots in the bases. but the best thing would be if it bothered you is to do as suggested above.
PVA always takes a while to dry, Torealis's way is probably cheaper but matches/Superglue will be a bit quicker and you can drill and pin into them if needs be.
Eithers cool as is Millput or Green Stuff, Im a smoker so matches have always been to hand so thats what I use.
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