I think that the floating heads is the greatest idea for my work on gourds. The biggest problem with the sander is the sanding disk heads fall off when sanding. It is very aggravating when you have to stop turn off the machine and replace the head before starting again.
Craftsman 0.5 amp 3D Sander is recommended by gourdman
Variable speed, 800-2600 rpm, bevel gearing, 240/150/100 grit, hook and loop sand paper mounting, 150 medium disc grit, plug in disc mounting, 3 x 1-13/20 in. disc size.