When I was making the RG Perfectibility, I managed to paint the entire thing, but the hip joints in the legs were stiff and both legs broke when I moved them.
I tried to fix it by inserting 2mm brass shafts, but the joints were wobbly and it wouldn't stand upright.
I had no choice but to try and reinforce it by filling in the holes with light-curing putty, but it didn't work.
Is there any better way to do this...?

When I painted the joints, they broke because they were too tight. | kenshi's Gunpla works