Hey hooberserenity, fun mod! I enjoyed the interaction between the gibbable corpses and the BFG effect.
I had a little play around with your BFG model as an exercise to keep my skills sharp. I set myself the goal of compacting the skin down to a 256x256 size (because skins with power-of-two dimensions are sharper in early GLQuake engines and waste less texture memory in more modern ports).
The resulting model is uploaded at
https://www.quaketastic.com/files/models/v_4.zip
Grab a copy in case you release a follow-up v2 of hte mod.