Gauge sizes
 

If a gauge is sized at 52mm or 60mm is that the inside diameter (ie the size of hole you need to drill) or the outside diameter ??

Cheers :)

With defi's it's the inside dia. I cut mine with a holesaw, then carefully opened it to the line with sanding drum in a dremel, with loads of trial fits, until they are a tight push fit.

DON'T do what I did though! I forgot the pod was f/glass, and had f/glass bits through my jeans and round my thighs and nads for about three days:eek:

Alcazar

:eek: