Decided to go with a 2 inch lift. Used two 1 1/2 x 2 inch sections of rectangular tubing for the base.
Removed the drivers seat by taking out 4 bolts holding it in. Bolts in front were easy to get to, but removed the backrest to make it easier getting the back bolts out.
Used 4 3 inch M8 x1.25 bolt to mount the seat back in.
Will see how I like it on my next ride.