Sectioning the struts would be WAY easier IMO, and you'd get the same effect. The rally cars do it for more travel without really raising the ride height and cg too much, IIRC, so the car doesn't look and drive like its on stilts. If you aren't looking for 9" of travel, then you can section the struts, run the struts closer to the top of the travel, and have more bump travel available.
If you aren't hitting the bumpstops then I don't suggest you do any of this. Maybe switch to a softer spring or different strut cartridge. I don't know what your spring rates are, but not everyone wants to drive around in a Z with 300 lb springs and Illuminas on 5.
Jon