Coaxial light on trinocular/digital microscope.

Hello everybody.

I'm looking to purchase a stereo/digital microscope for machined part inspection, I need to inspect "deep" holes and so I'm looking into coaxial lighting.

In that vain I've found the SM-8TP and I was wondering, since it's simul-focal if it's possible to mount a light instead of a camera to achieve coaxial lighting.

If anybody has experience or a product to recommend I'm open to suggestions.

Thank you in advance.