Turned its adrenal gland into a special symbiotic organism unique to the Swarmlord, which helps out with psychic powers and synapse. Then turned the upper scything talons into two larger boneswords, with trigon mandibles for the lower hilts... saw this on Warpshadow somewhere... credit is due to the bug brotha/sista that came up with that. Then the toxin sacs had to be popped off and GSed over, since that vent area lost its detail with the glue.
Then some leftover trigon spines for extra spiky carapace and mandibles. Then a scything talon tip for its second crest horn, and this Swarmlord is born.
The GS work on the large boneswords isn't very smooth, probaly would of been better with plasticard, but I make due with what I have hehe.