Dave didn't mention how to attach thighs to the Torso?...
Dave's Garage Episode 9 Pt1
The FX thighs are a problem... One is larger then the other and they are not sculpted enough to fit well, it takes a lot of time and wearing to get them right. Don't trim to much though or your won't be able to move well, I suggest wearing all of your armor and then trimming them.
To be honest I still have work to do on my thighs.
Like TK4999 said "One thing I found at C-IV and CE is that my thighs do "pump up" when I am trooping in armor days at a time, so what feels comfortable on the first day definitely is not comfortable on the third or fourth day." and my own experience of wearing them at the Comic-Con for a Troop I can only agree.
I have some foam in the inside for comfort only, I glued the front and velcro at the back though I do need a larger piece of velcro at the back to stop them coming apart as they both did once at the Comic-Con. My thighs attach with elastic & snaps from the torso to the top of the inner thigh like a suspender...
Good Luck
Dave