I actually like the idea of the RM2D with just the rise and fall with the option to stitch. What I was wondering though to stitch you need to lay it on it's side so is there some type of attachment to take the grip off and add a tripod set up. Be nice to just release from clamp flip to it's side for stitching and rotate your back to do a nice horizontal stitch. The rise and fall would be more important to me but a easy way to do a stitch and a good price may just push me over the edge plus the small size.
The Rm2d has both vertical and horizontal movements in the rear. For comparison with my post above:
RM2D: up to 6x9 format
===============
Horizontal Shift: +15mm / -15mm
Vertical Shift: +20mm / -10mm
Tilt OR Swing: No lens movements
Weight: 0.7 kg
Basically, in comparison to the Rm3d, the size of the Rm2d was reduced in the vertical by reducing its vertical movement (10mm less), but it was NOT reduced in the horizontal. The size savings in the horizontal was reduced by eliminating the option for an E-module with the Rm2d.