I don't know the necessity of it all, but I will tell you how I would do it.
I looked at your design, and it should be easy to make a height adjustable pedestal. I would keep it simple. You basically have a rectangle box stand that goes up to your control panel. I would make an outer "sleeve" come off the bottom of your control panel, and it would slide down on the stand, which is an inner sleeve. The inner sleeve portion would have sets of holes at various heights. The control panel sleeve would have one set of holes at matching locations, and what you would do is simply slide the control panel portion up and down to the height you want, line up to the nearest holes and slide in pins to keep it at that height.