After months and months of sitting on my desk it's finally done. I picked the Carnifex kit as my prize for Fantasy 'Ard Boyz Prelims and intended to make a Tyrannofex, so I've had it on my desk since April. I found this conversion very difficult. The hardest part was the upper carapace. I used Instant Mold to make the cannons.
Originally I was going to have his claws gouged in the ground like a Biovore for support, but I couldn't bear to cut the claws off at the tip. I like them too much.