Shock piston holes and size?

[Natedog]

I'm building some Losi shocks for a project and want the same damping as T-Maxx shocks, but don't have any here to take apart. Losi are three hole and the hole size is in numbers....ie. numbered drill bit sizes correspond to the hole size. I see that Traxxas part number 2669 for the aluminum Big Bore shocks come with two and three hole, but it doesn't say the hole size or which is standard on the kit. The plastic Ultra Shocks are number 3762 (black) and 3762A (new grey color) and they don't say which pistons are used either.

What size are the shock piston holes and how many are their?