Standard thumbwheel set that can be found at harbor freight

http://www.harborfreight.com/3-piece-thumbwheel-ratchet-set-94011.html

Adds more grip in tight Area

Why pay 2 for 20$, when you can have three for 5$?

http://www.amazon.com/GearWrench-81222-Thumbwheel-Ratchet-2-Piece/dp/B001M0O1B6

Designed for the 1/4 Pittsburgh Thumbwheel

1)Print adapter
2)Clean holes to make smooth
3)Press Thumbwheel in housing
4) Enoy