You should probably get the Google Docs spreadsheet going.
With all of this is the improvement that your setup brought. You should always do one mod at a time then go back to the same track and compare as closely as possible. Try not to do a seat of the pants assessment.
I suggest: comparative time before mod, after mod, spec miata (fastest time at that track).
The best and most effective mods are drive, square setup, camber and alignment, cooling system, corner balanced.
LSDs, more power, coilovers and swaybars can be good but I can't tell you how many people don't know how to reap the benefits of all of those because the driver hasn't been modified. I am in no way an expert but with good instruction I have in 1 day taken 2 seconds off a lap with only driver mods.