it's real easy once you get the hang of it. I've removed the whole leg assembly a lot of times for my 1/60 VF-1s, 1/48 VF-1J, VF-0S and even my YF-19 when i want to make the hip joint tighter (since it's a friction joint, the more you pose the legs, it'll eventually become loose esp. when the paint on the ball joint starts to chip off). once you remove the leg assembly from the two-piece block that covers the hip ball joint, it's pretty much a straightforward procedure. the two-piece block is just held by a single screw and not glued together.