Hmm yeah, that's what I was thinking as well...
I actually have some rubber matting for the thigh parts left-over from another build, so I'll have a look and see if I can fashion something...
I'm pretty much the exact build/height/size as the R1 DT's, so I'm very used to clothes needing to be altered before they fit me haha.
Out of curiosity, how much space should there be between the thigh and the armour piece? I was going by the "thumb rule" (being able to fit my thumb inside the piece on all sides at the same time), but the CRL picture definitely looks more fitted than that.