Patrick I am not familiar with the exact structure of the legs of this instrument, but from your description, it sounds a lot like a Kurtweil "piano" keyboard that I have to work with. A local music store had its stock displayed on a set of platforms on wheels, and they had one built for this unit. It is simply a sheet of plywood with a wooden frame around the outside and covered in the material that they use for the outside of speaker cabinets (that slightly fuzzy material) with the corner braces like you find on Anvil cases. A simple set of pivoting casters are mounted to the bottom close to the corners. The only improvement that I would like to make is to lay the keyboard on its back, place the platform on its side against it, drill a set of holes through the bottom of the platform into the pressboard legs and bolt the unit to the platform. The platform or casters that you use are going to raise the instrument too high for a standard bench, but we substituted a stool that is at the correct height. An advantage of the platform is that if there is a cross piece with pedals mounted on them like the Kurtweil, your feet are at the right height to still use them correctly. (You put your feet on the platform to play.) If your unit has a stand alone sustain pedal as most keyboards do, you will be able to mount it to the platform so that it will not be dragged around, pull on the cord, every time someone moves the instrument. Rex Roseman Roseman Piano Tuning
This PTG archive page provided courtesy of Moy Piano Service, LLC