I found these dead perfect match for the master bath so I purchased 2 his and hers.
Started by Taping off the general location for the new dispensers.
Then locating the centerline of the faucet and the calculating the distance from the top edge of the sink, then determined I liked 3 inches from the faucet
Marked the location , Then I checked carefully for clearance on the underside.
Drill pilot hole 1 drill size smaller than 1/4 inch as the pilot drill on the hole saw is 1/4 inch, this give a steady pilot when boring the hole.
For this dispenser I selected a 1 inch hole saw blade.
Carefully sand all the sharp edges as not to cause any stress risers that can start a crack.
Vacuum up the dust and install the dispensers.
Finish product looks amazing.