There are some three mods around tuning the FDE.

First, the highly recommended gauge and tweak from Paul. http://captainsim.org/yabb2/YaBB.pl?num=1356995479
Second, the one from Bud which can be combined with Paul's work. http://captainsim.org/yabb2/YaBB.pl?num=1339198966
And Ryan was also testing some new values. http://captainsim.org/yabb2/YaBB.pl?num=1354222724

And there's some recent discussion here. http://captainsim.org/yabb2/YaBB.pl?num=1355538264

Hoping it helps.  :) I'm using Bud's FDE with the gauge from Paul.