I needed to make a parody sailor fuku for our Sailor Moon-themed halftime show at AWC '12, and I decided that if I were going to go to all the trouble to make a fuku, I might as well make a non-parody version that I could wear during the day before the Masquerade so I didn't have to change. I made all parts of the outfit modular so that I could easily switch the colors of the collar, bows etc. to change characters.
Surprisingly, it came out looking halfway decent! I'm pretty happy with the base costume, so I think I'll go ahead and make the accessories and do a full version.
UPDATE: Full version, including new (purple) bows, jewelry, boots, gloves, and time key debuted 9/7/13.
Best Performance, Midoricon 2013