Since I am electing NOT to use the suggested Tosten Stick Grips, I had to make up for the loss of height. The Tostens are mounted atop the control sticks, thereby effectively extending the stick by the length of the grip.
I will be using the Ray Allen grips, which slide over the top of the stick,, so I had to make up for the missing length.
Ordered some 7/8" OD Aluminum tube, cut to length, and miled the ends for a nice interference-fit into the existing sticks, Added a rivet to each to ensure they stay put.