The right thigh piece has turned out great! The material on the seam for the back part of the thigh piece (that is used for the overlap) was wide enough to glue on the front half, despite the 1cm channel being accommodated. The 1cm channel is clearly seen in both photos, and as discussed earlier in the thread, that will be filled in with an ABS shim on each side and accompanying ABS paste to cover over the rear seam created by the shim.
The fit is great too! I have a little bit of wiggle room, but the thigh armor does not appear to be unrealistically large for me! I especially like the built-in relief in the back of the thigh piece, as I feel I can move my leg more freely than when wearing my shock trooper, even with the relief cuts on my shock trooper (but I'll reserve full judgement until my full Legacy is complete).
The left thigh piece is currently gluing, and that will be cured in a little less than 24 hours!
This certainly boosts my confidence in my build from where I was earlier today! I should remember than builds can feel like a roller coaster at times.