>>8800180>gapsSomewhat related, I've been toying with the idea of scratchbuilding filler pieces that would sit between the pelvis assembly and the hip joint that would fill in the gap. It would ride on the hip peg so that it would rotate out of the way when the hips move forwards or backwards, filling the gaps that form from the front/back. They would effectively be sliding buttcheek pieces that move with the hips. Some kits like the ATK Girl line have really obvious gaps there so I think they would benefit from this.
Something similar to this was used on the MG Figurerise Kamen Rider W, pic related.