I built my personal MPCNC last year already and i did quite some things with already.
For my latest project i need a special cutter, which only comes with a 12mm Shant.
My trial with a 8mm to 12mm Shant adapter were not very successful because
its just vibrating not, really milling.
So i believe i need to get a Cutter with a 12mm insert.
And of course it should fit into the 65mm round socket in my MPCNC