For Terry Smythe -- I built a grand piano tilter designed very similarly
to the familiar upright piano tilter for just the reasons you described
in MMD.

It is designed to roll the piano from standing on its side, on padded
8-inch blocks, to the normal horizontal position and height where the
legs can be re-attached and the "tilter" removed from under the piano.
It is a one-man operation even with a Mason and Hamlin 6-footer!

The principle is that the center of gravity remains at about the same
height, raising only a few inches as the piano goes from on its side to
normal position.

I have plans somewhere which I will try to find for you.

Bob Hunt