I spoke with them and they were surprised I netted as much and indicated that while springs will settle some, they won't settle that much and yes - if I'm not happy I should return them.... god bless amazon for free return shipping. I have 1.5" TF ones coming in that I'm hoping will fit the bill. I pressed again about the differences and turns out the 1.5" ones have spring rate of 180. So going back to my original calculations and thinking, if they net me a hair over what they advertise (probably not as much as the outback ones as they're lighter duty) this might be the ticket. Should they compress more under load, I can always stick the spacer I have to compensate. In general I need to get more lift then I have now and deal with the weight of Ursa Minor top when it comes in....... cue the tune titled "March of the gladiators" as I run around looking for an empty chair

(wonder how many will get the joke

)
Which airbags did you get? How did they mount? Air through the top?