7206 Bolt size and spacing?

I am looking to custom build light mounts with 8020.net extruded T-slot.

When mounting:
1. What is the thread size in the LX7000 series?
2. What is the centerline spacing distance?
3. How much space do I need above to not impede fan exhaust?

Regards,
Eric

Hi Eric,

1. M4
2. Spacing between mounting points, 6.75" or 17.1 cm
3. Give it at least 1.5" or 3.8 cm of space.

Perfect! Thanks for the quick response.