I just finished upgrading my machine, replacing the X axis with a solid 40x40 open build beam and rails setup. Then I bolted on a 1.5KW water cooled VFD with an 80mm outer diameter.
I had originally bought the .8KW but released the magic smoke by not setting PID 004 to the correct value, the place I bought the motor was out of stock of the .8KW when I bought the replacement so I went with the 1.5KW. I had to design up a new motor mount to fit the larger motor, I based it off of a design @Travelphotog had originally posted. This spindle mount is designed to attach to the universal plate: https://www.inventables.com/technologies/spindle-mounting-plate
Outter.stl (3.9 MB)
Inner.stl (4.0 MB)