I had a rare sebenza with an unusual thumb ramp. chris did it on a milling jig , it came with a card from mike young from crk....for years i never used it because it was "RARE" but in the end when i sold it on an auction site , it just didnt bring any more money than a standard sebenza. Funny because it was one of ten, you would have thought it ment something. It had a longitudinal thumb ramp and although it looked cool it never went into production because i think it wasnt all that pratical. Any ideas why it just didnt bring any serious mmoney? Thanks guys.