So you still have the insoles that came with the Sidis?
If they're anything like the ones in my new Genius 5's, they're crap -- and, therefore, I have no reservations about throwing them out and putting in something of my choosing. I even think that Sidi understands that many people swap out insoles right away anyway, so they just use the cheap, thin foam mats as a way to dress up the interior of the shoe.