I used it in a "Spice" simulation sometime before (Feb2006), and boy isn'it great?! (in the graphics & simulations I mean)
So, for the Fountek NeoCD2.0 Ribbon Tweeter I used:
R=6.5
L=0.1mH
And also you can go lower about to 2K/2nd Order easily if you want.
Tell us more when you try, as it sound and the xover you go with.
Wayne is of great help allways,
Personally I would put it up w a 2order, but you decide and later share with us your preference.
Best regards