KF2 Shock Piston Drilled

[moggers]

Hi,

Needing a small amount of advice
I've noticed on a lot of KF and KF2 setup sheets from various drivers that on the rear shocks they show the pistons as being drilled. I know the kit rear piston on the KF2 is 1.6, so does this mean they are being drilled larger than the standard 1.6mm ?
I'm using emulsion shocks and with 400 oil, they are very sluggish, so was wondering if a lot of setups are drilling out the pistons to larger holes than 1.6 ?

Appreciate people's thoughts and advice

Jason