a base with a built-in relief channel (instead of making it out of foam) is a really good idea. I have the “stock” KH fusion slim saddle atop a Shadow handlebar (allows for a 4 x 6 degree adjustment via an integral high tensile bolt) with the pivotal seat post in it’s highest (front up, back down) setting on my geared 36er for road distance. I “learned to ride” on an Impulse with the Nimbus Gel saddle so the relief channel “for nerves in those sensitive areas” on the Slim makes a big difference in comparison. I probably won’t buy a Nimbus Flat is offered as an upgrade (I will probably end up with another Nimbus Gel Saddle in the trading post) on my soon-to-be-purchased 26x3 Nimbus Oracle which will incorporate Nurse Ben’s aftermarket customized grab handle (which is similar to Mark’s impressive set-up) but I doubt I’ll be able to Mark’s drop dead sexy Ay-Up lighting system with my GeoManGear MagicShine.