Has Anyone Used an LXMini+2 Crossover to Modify a Speaker other than a Linkwitz Speaker?

I recently bought a LXMini+2 (balanced) crossover at the Linkwitz web store to upgrade my Spendor speakers from passive to active crossover.

My intent was to use the online calculator here: http://doublesecretlabs.com/apps/passxo/ to calculate the needed resistor and capacitor values. But I am not sure that the online calculator is applicable to the LXMini+2. Does the calculator work with the LXMini+2?

Also when you changed from the passive to the active crossover, did you simply calculate then 'plug in' the resistor and capacitor values that would give you the stock factory crossover points? Or was there much more to it than that?