I owned a Sherpa,it was good through the single track & confidence inspiring down hill.However I could never get the front wheel to pop up over obstacles ,(I admit to poor technique here).How ever I sold the frame & bought a s/h 2Souls Quarterhorse.Night into day.It has all the qualities I liked in the Sherpa plus it is more comfortable & the short chain stays allow me to lift the front wheel over obstacles & it feels much more playful.I built it up single speed with 120mm forks & it weighs 25.8lbs.If there is a disadvantage it is that the medium frame c/w sliding dropouts & 142 x 12 axle weighs 6.3 lbs.The odd thing is I never notice the weight even though the Sherpa was about one pound lighter.
Hope this is a help.