All I would say is be careful about max RPM of the chuck - assume it’s a variable speed grinder as most drill chucks can’t handle the 8kRPM of a grinder at full speed…
Also - what kind of mushrooms you trying to grow? I have been unsuccessfully attempting to propogate oysters on oak lathe turnings.
Oyster are the easiest. You grow mycelium and the mushrooms are a happy accident which can be encouraged
I could do workshop?
It’s for a large small fat wood drill bit for putting loads of dowels in wet wood and takes about 2 secs per hole. I was surprised that in this specific application it was remarkably safe with correct PPE