OK in that case if its also non-canon stuff:
. The regult plastron cannons pop out quite easily and you could therefore do switchout options. The standard is particle beam but what if there were other weapon options - plasma, matter eater, maser, rail, ion, micro-munitions etc. Coloured black, with plastic of a similar feel, and each with a look that is unique but still consistent with the overall style of the Regult these could be interesting. They could come in a weapon pack with the top mounted canons.
. How about a flying recondrone option for the Regult Scout if/ when it comes? Something that clips onto the top mounted "wing" and can sort of look like it belongs? Or how about a gravity/matter eater mine layer switchout/add-on that deploys self burrowing mines?
. If the top mounted cannon on the Glaug can detach (have'nt tried) it could mount some serious missile racks. Or some other large exotic weapon.
This is just the fan in me writing of course, I dont know who else would be interested in this type of thing.