Really Right Stuff. BH-30 LR: Compact ballhead with B2-40 LR clamp
Compact yet extremely sturdy and fits well in our case with plenty of room to spare. The company claims a 15-pound load capacity, but it can probably handle more than that in our humble opinion. Very smooth three-position lever-operated Arca-type clamp. Finely crafted. Does not include a quick-release base plate, which must be purchased separately (see below regarding L plates). Again, this unit should be mounted to the Platypod®Ultra plate prior to insertion of spike-screws but can mount on Max with all spikes already in place. Large ratcheting control lever/knob clears the plate and locks the ball head very well without the need for any tension control.
Somewhat expensive but well worth the price and seems to hold its value reasonably well at resale.