Knolly's Endorphin may be the Chilcotin's younger brother, but if I was daddy, the Endorphin would probably be my favorite son! Versatility is the name of the game with the Endorphin.
You can build up to be a svelte lightweight marathon bike (under 25 lbs.) with a 140mm fork or build it up to compete in the ring with the Chilcotin by throwing on a 160mm fork and some beefy tires as this frame has an appetite for technical terrain! Coming from the Chilcotin (which I loved) as my primary trail / all mountain bike, I didn't want to sacrifice descending capabilities. However, I wanted to drop some weight as I felt like the Chilcotin was like bringing a RPG to a gun fight with most of the riding I do here in the SF Bay area. My large Endorphin came in at 28.5 lbs. with pedals ... 3 lbs. less than my Chilcotin!
For this build, I wanted to go with a Wrench Science theme so I incorporated orange wherever I could without going over the top. The raw color that Kevin from Knolly suggested looks great with this theme.