FOR PEOPLE WHO BROKE THEIR MP-44 HERE'S HOW I FIXED MINE. THIS IS ALSO MORE DURABLE THAN THE UNBROKEN ORIGINAL. Thanks to @kentan99 for the original idea. @God Orion I never expected to be the one making a fix, but here ya go. Step 1: Disassembly This is the back of the thigh piece you wanna take off. Should Look like this when you're done. Step 2: Ratchet Here is the ratchet piece that all the breakage surrounds You wanna apply the glue on the bottom of the ratchet on the "outside" of the ring connecting it into the inner calf. Also, I recommend using gorilla gel super glue to do this. Real durable stuff. Put the piece into it's slot and clean up the excess glue with a toothpick. Leave it to dry for around 5 mins. Step 3: Reassembly Screw in the lower ratchet pieces like so and position the ratchets as though the leg is straight. This will allow you to reattach the other white piece easier. Put the knee back into the thigh and put the ratchet in like so. Screw the back of the thigh in. Step 4: You're done. It probably won't break anymore. Life's Good. Now you can play with your MP-44! I will do a paint fixing tutorial in the future. I have a lot of scuffs. @Jarrod adds: Great fix! I was going to suggest similar, but you've already done the work. Also, adding tiny pins like the Japanese Twitter user from earlier would definitely work too. Having this in hand, and seeing how everything works, its clear, that stupid little blue ratchet piece is absolutely the offender. Regardless of how tight that ratchet is, or how snug the white channel is, because it's a separate part from the lower leg is the problem. I can't see any reason why it's separate as well, and seems to be a pretty poor decision and bonehead move on TT's part. The ratchet compresses inside the knee, so that small part should have no reason to move, and therefor no reason to be separate. So, for those of who you have intact knees, here's some preventative maintenance I have done. Now, this could be completely avoided if you're just careful, and understand one specific point: The most important thing to understand is, the tab, indicated by the green arrow, MUST slide into the channel, indicated by the red arrow, to allow the lower knee to bend! View attachment 28380235 It should look like this. View attachment 28380236 BUT, the tabs on both my legs were a very snug fit...like they barely slid it, and I could feel resistance. Likewise, the tab can be slightly misaligned. This is due to the tiny bit of play in the ratchets, but also the play in little tabs on the small blue piece. (Another reason this part should not be separate, because then there'd be no play there! View attachment 28380237 If you tried to bend the lower joint, with the upper joint fully bent, but the tab not properly aligned, as shown above, you will damage the ratchet housing! So, I took apart the lower leg, and trimmed down that sliding tab some. I first trimmed the "front" edge (red arrow), the edge that goes inside the channel first, into a point. This way, if it was a little higher or lower, it could guide into the channel. I also sanded down the upper and inside edges some, the edges indicated the green arrows. View attachment 28380240 Lastly, I noticed during disassembly, that the ratchet part, visible below, was kinda tight on the shaft indicated by green arrow, and didn't slide up and down as easily as it probably should. View attachment 28380241 So, just to be safe, I pulled out that small ratchet piece and spring, put some hobby lube on the shaft, put the spring and ratchet back on, and put a little lube on the ratchet too. Don't know how necessary this was, but better safe than sorry. View attachment 28380239 Finally, put everything back together, and I can now freely swing both joints back and forth with a smooth, buttery motion. I no longer get the stop with a little resistance before the second joint kicks in, and the tab slides right in and out of the channel flawlessly! I think adding some oil/lube to the rail would probably be a decent option as well, if you don't want to, or don't feel the need to trim/sand the rail on the blue piece. And you're right, it would definitely be the quickest option. I think adding it the ratchet is probably a good idea as well, it certainly can't hurt! Thanks to @Jarrod for the insight.