If this worked, then repeat it, but do not assume everything will work the same, nor will you look on Sat am for prejudging what you looked like Fri evening this time around. Push the timing up 12 hrs. to try and time it for prejudging vs Friday pm.
Next time around consider this. First I wouldn't cut carbs completely from Mon - Wed. Consuming 30 - 50 grams/d is low enough. It is not necessary to go zero carbs to supercompensate. This has been studied extensively in endurance athletes.
The carb up regiment sounds fine.
Cut the water to about a gallon on Friday and about 8-10 oz on Sat before prejudging. No need to cut it completely.
If you're truly taking in 10 g/d of sodium and I doubt you are (5 grams of mustard = 55 mg sodium) that would be about 2 lbs of mustard a day; regardless only cut the sodium in half 36 hours out from prejudging. A good intake is about 5 grams, then cut it to 2 1/2 or 2 36 hrs out. It takes the body 36 hrs to come into sodium balance. If you start too soon, you may be in for a surprise on Sat morning. In addition, you need both sodium and water to carb replete. Distilled water is not necessary and unless you really like mustard, I'd just add sodium to your food so you know exactly how much you're consuming and what you can cut.
Drop the cardio and workouts mid-week. Only posing Thur and Fri. If you're not lean enough by then, there's nothing you can do. Doing cardio or lifting will just impair the carb repletion.
What is on your legs/glutes and lower back is probably fat, not water and it may come down more in the next two weeks. None-the-less, if you try to dry out too much, you'll go flat and lose vascularity, but will not change the legs/glutes and lower back much. There are no quick fixes for this, so just be careful you don't peak before it's time. If you looked really good this past friday, ease up a little. Sounds like you're really close and could over shoot.
As Dorian use to say, two weeks out you should be contest ready, the last two weeks are for fine tuning and maintenance, not last minute fixes.
W6