The other thing about going arca swiss is, since my Sachtler is already 502 manfrotto dovetail, I'd end up using too many plates on top of one another. I use a VCT-style plate on my large shoulder rig so it is balanced both on the shoulder and on the tripod without making adjustments each time and adding an additional arca QR would cause the camera to sit too high on the rig. The idea is I'd like to quickly go camera>tripod, camera>shoulder rig>tripod, camera>slider>tripod, camera>glidecam, etc. Only the QR plate that mounts the camera to the shoulder rig needs to be top-load (so I wont have to remove the mattebox or battery plate to mount the camera) so I just need one top-load plate and then can use cheap 502 slide-in QR plates for everything else. If I have to spead $200-$300 on a modified Sachtler, I'm willing to do that. Just don't want to drop $900 on the O'Connor.