A note on the Arca lever clamp. First, understand it is a 2-position lever. The first position is the stop at 90 degrees out and is designed to loosen the plate enough it will slide but cannot be lifted directly out. (If you use an RRS plate and have the stop screws in the bottom for example, the plate slide for adjustment, but cannot slide all the way out.) Now you notice the exposed screw on the underside of the lever has ridges -- these are there so you can push your thumb against them, then slide the screw outward further to release the first position lock. Now you can fold the lever all the way back on the clamp to 180 degrees open. Here the jaws are wide enough the plate can be lifted directly out of the clamp. IMO, this is a pretty neat feature and why I like the Arca clamp.
What I had to modify on mine was the cam on the lever at the first stop position -- it would not open enough to allow plates to slide if the clamp was tight enough to hold them locked when closed. The full open position was fine though. It appears Arca has corrected the profile on the cams in the later builds.
Sidebar note: Arca now has a small dovetail as standard they are using for some of their new tech cameras. This is basically the same dovetail that is on the base of their LF rails. Anyway, if you look at pictures of the new Z1 heads, you can see the clamps now accommodate BOTH the regular and smaller dovetails. I'd be interested to know if the new Cube has this same double-dovetail clamp?
PS: I agree the RRS lever is a nice solution, but it isn't adjustable (so only works reliably with RRS plates), isn't 2-position and most importantly it doesn't lock. So a word of caution if you use them: I have had more than one workshop participant snag that lever on a jacket sleeve or glove edge and open it unknowingly, only to have their gear fall off their tripod unexpectedly -- not pretty to watch.