One day when I do something amazing I will take photos and figure out Photobucket. Until then 
Sorry if this gets long winded. I am going to try and cover everything here.
Okay. How does the hip work?
1. Inside that big black piece at the back there is a ratchet that controls angling the leg in and out in the horizontal. I haven’t heard of any problems with that.
2. Where the blue piece joins the black there are a pair of ratchets that control angling the leg in and out in the vertical. There are little purple plates in the black piece that can be out of alignment by 90 degrees. If they aren’t right the leg sticks out slightly which is a problem in base/Nemesis mode.
3. The big hua that controls movement back and forward. There is a spring underneath that lower ratchet that pushes it up into the upper ratchet. The cross holds the leg in place so it is important.
The failure seems to be something stops the ratchets disengaging and people force the joint until the cross gives up. Maybe the spring is too strong. Maybe the teeth are too deep. Maybe, because people seem to get acceptable movement in one direction, the spring is digging into the plastic. In any case, because it is a big bad ratchet that you must apply a bit of force to anyway, it is easy to get it wrong.
Fixes.
2. Take the hip apart and rotate the purple plates until it works. There is an element of trial and error. The toughest part is controlling two separate springs and not losing everything.
3. Okay. The big one.
I have seen three fixes.
1. Remove the spring and pad it out with stuff until the ratchet engages again. The materials involved seem to involve paper which is not good long term.
2. Cut the spring. Pad until it is the right height. Destructive, with a sharp spring end inside the joint. And maybe paper.
3. Put something between the teeth of the ratchet. I have used this because it is the least destructive. The ratchet marked in blue naturally slides down the cross marked in yellow as part of its normal movement to clear the upper ratchet which is at nearly the same height. I initially tried a 20c piece, but it is too thick. You need something thin enough to sit between the cross and the teeth of the upper ratchet but firm enough that it is not going to get chewed by the teeth. Eg. card is not going to work. Thin rigid plastic seems to work.
The ratchet stops being a ratchet and becomes a friction joint with the spring providing the tension to hold Trypticon upright. Because the teeth of the ratchet can’t mesh, there is no immovable object the leg won’t get jammed and you can’t apply too much force.
I have found the result to be better than as designed when transforming it as the legs require a bit of posing during transformation which puts stresses on the side doors when they aren’t locked in position. Those were really strong ratchets.
Posing is fine. Some balancing may be required with full therapod stances. Don’t try and get Devastator to ride him. There is nothing to stop a nose plant. I haven’t really experimented with how much weight he can carry forward in each stance. Godzilla and tail dragging (and lifted) seem fine. The tail is your friend for balance. Use it.