I've done the same. I wonder how much my car weighs when I do put it in full auto-x prep.
16.5 lbs wheels and 20 lbs tires shave a ton of weight off each corner. Take out the spare tire and tools, floor mats, and glove box stuff. I bet it's closer to 100lbs of stuff by the time I'm done. I do want a new sway bar which would be hollow and lighter, a race seat, lighter battery, CF or fiberglass hood at some point.
And when I start getting really crazy I'll strip out the interior and add a roll cage haha.