>>8652941Not the same Anon but I have Abominus and I've done a few modifications to get tighter joints. The white object is a piece of 5mm styrene tube. It provides considerable resistance against the rectangular grey spring around it. The other ratcheting mechanisms you can screw open. You can put a washer or make one out of a styrene sheet inside the cylinder to compress the spring.
The limbs are tougher to tighten as it requires removing pins to get to the ratchets. You can try floor polish or carefully pushing a piece of a thin sheet of cardstock or styrene to get extra friction.
Obviously I'm assuming that Halfshell and Turtler have the same parts as Hun-Gurr.