Okay, so inspired by BeastProwl's reference, I decided that my PRID BH needed some more surgery:
So, I cut the rear doors off from Bulk's "wings", and then tried to figure out how to join them:
I settled on using Lego, since I have a ton of it lying around unused. I found some lego hinges and then cut them so they would fit behind the doors:
However, I found that these hinges were too small and there wasn't enough glue holding them in place so they kept popping off. I then decided to go with longer hinges:
Now, even with the longer hinges, the darned things kept popping off. I had been using testor's modelling glue, but it's pretty useless with harder plastic, so I switched to Epoxy and so far I have had zero problems. It's also worth noting that you have to trim some of the details in the inside of the door to have this hinges fitting nicely.
So here is the finished product! Note that I have my doors hanging low, which allows the back doors to contact the "trunk" area. I like that it fills in the gap quite fully, and kinda makes Bulk look a little rounder... dare I say that he has "love handles"?
And just to show the difference if you have the doors high on the chest:
Next up, I'm going to try and turn the leftovers of his "mace-gun-monstrosity" into a chaingun or something else befitting a Wrecker. Then with the Reprolabels set for this BH, he'll be as good as it gets barring a FE figure!