Flight Illusion guages diameters?

I need to know the exact HOLE DIAMETER for the following gauges, since it doesn't clearly state them on the website:

Flap Indicator
Yaw Damper Indicator
Brake Pressure Indicator

I'm having my local CNC machine shop build my B737 MIP and I need to know the exact hole diameters for these gauges.

I posted this question on Flight Illusion's forum and even sent an email directly to them and still no answer. Which is really making me think whether I should place an order from them or not, seeing how long it takes for them to answer any concerns.

Thanks!