I uses the Rahkshi quite a lot when i first got it, and occasionally more recently. I guess its just made of stronger materials back them. I made it and have taken it apart a few times back then, though kept it together mostly since then. All the joints are as tight as they were originally and all the functions still work. I haven't seen any issues with it tbh ><
Onua 2015 broke within the first week simply because i moved his arm a couple of times. I built it once and didn't take it apart. First it was the hand piece holding the balljoint (Naturally i did have to replace this), then one of the joints as a friction adder just snapped it when moving because it was too tight while the rest of the joint was too loose.