You’ll be fine running flood coolant and If it’s available I would recommend to do so.
They may not let you hack their machine but it’s possible you can rig up a 120v coil solenoid valve actuated by the M8/M9 output instead of the coolant pump..
The biggest advantage to running dry vs coolant is more the lack of mess, expense, maintenance and degradation of the machine. It all depends on your priorities.
I personally run everything dry in my home shop CNC with just an air nozzle to clear chips and occasionally some tapmagic if I’m drilling aluminum or running a problematic tool path that I know will induce recutting or chip welding.
accelerated tool wear with dry cutting is the trade off.
Oh and you absolutely need to use carbide if your cutting dry. HSS will die a quick death.
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