So, back when I did the site last time, I had a few requests for this feature, but honestly, since it didn't affect me, I never got around to doing it
But now that I don't show stats for SP reasons, I have added this feature in. It only works on users who don't show stats, you can use my page as an example.
http://www.stataddict.com/player.php?name=AceoStarWhen looking at your stat calculators, you will see "Save Stats" link at the bottom, IF you don't show stats.
Type in your stats and click the Save Stats link. This will allow you to have the stats you typed in pre-populated next time you come back to the site. You can do this for any user who does not show stats, but it really only makes sense to do you own.
As a side note, this data is not being sent to the server, so no need to worry about me harvesting your stats. The estimator does a pretty good job of that already, ty Rokugo!