I did the same on a laser. Used a 20volt craftsman with 550in.lbs. Didn't want to tear apart my good and pretty new M18. Works awesome!!!!!!!I just put together a spanking new Milwaukee M-18 Fuel on a Clam Drill Plate to go with a 6" StrikeMaster Mora Drill. Now I need to test it out.
I was thinking the same. A 8 takes a lot more torque than a 6, one guy on iceshanty tried it, went back to a 6.One of my first thoughts were to put an 8 inch Mora head on and see how that would work with the M-18, but then if I want a bigger hole can just drill another 6 along side