Is the ArcaSwiss C1 Cube the only compact ArcaSwiss-style quick release geared heads out there? I'm currently using the Manfrotto 400, but it's proving to be too much of a beast to haul around in a backpack that, or I'm getting old!

The Linhof 3D Micro, and Manfrotto 405 and 410 have quick release plates, but are incompatible with longer plates (which are the kind I mostly use). Attaching an ArcaSwiss-style quick release holder to the default plates for these applies a lot of torque (due to the length of the plate) on the tiny 1/4" screw. I'd rather not worry about the gear failing, and concentrate on the shot.

Are there any alternatives to the C1 Cube, or is it the only game in town?