I ran my +14 at LS with my Elka and stock linkage and it worked flawlessly. I did adjust the compression a little. I am not at all worried about the minimal difference of two inches. If I can design this swingarm, have Tim build it and see if it will pass my hardcore testing, I think it would change the whole swingarm game.
Guy doesn't want to spend $700+ on two different length swingarms, plus time to swap them, plus parts laying around the shop and so on..
He wants to dune ride and do some drag racing in the same day at the dunes. Run it at +4 for duning and adjust the carrier position to +8 and go dragging!