I got these a long time ago. Ive been drilling my own pistons for a long time. There are other brands available, if you search drills. Almost all the fast guys re work their shocks because there is no one scenario fits all, in these rtr days most people dont even think about it. Your on your way. Make a log of F/R fluids and piston hole sizes and how you felt the car drove with each setup. I do this because its hard to remember the details later.

http://www.amainhobbies.com/product_...ston-Drill-Set