I am new to the CNC world only been at it a couple of months. I would like to upgrade my home made cnc from a dewalt router to a VFD spindle. I was thinking of getting a 1.5 Kw or a 2.2 Kw spindle but am not sure what the power difference is between them. I am just milling wood and some plastics.Any knowledge imparted would be greatly appreciated. I am using Mach 3.