Just doing a little more research here is what I found
Code:
Comp Ext Travel
RSX17505 9.75 13.875 4.125
RS5764 9.75 13.875 4.125
RS99764 7.625 12.125 4.5
So they are 1.75" shorter at full extension that the RSX struts which are typical used for the Frankin Lift. However, the Daystar top plate drops the strut down what looks to be 1.5 to 2" (some one correct me if I'm wrong) so with the Daystar top plate you would have the same effect droop as the stock assembly (assuming RSX are stock length?). Then you could use either a little clevis lift or an over the top strut spacer to droop her right to the point before UBJ contact.
Now since your effective strut assembly length can only be increased to basically stock what about spring pre-load?
Well since you would probably be using about .3-.5" clevis lift or an over the top spacer to increase droop then you would not need to add as much preload to gain the same amount of lift so the extra pretension would be less probably not effect ride quality.
Why all the complicated info if there are good lifts on the market now?
Well you get the ability to make adjustment in the front ride height incase you add a bumper or winch later.
Also you get the ability to control shock valving. It seems sometimes that the damping can be a little firm on small road imperfections, however not enough when 4 wheeling especially when dealing with who-dee-dos. This way you could simply crank up the damping while you are airing down and have the best of both.
Why not its just fun to try new stuff out.