The 75mm head system supports a safety payload of up to 12 kg (26.5 lbs), making it ideal for fully rigged cinema cameras and long telephoto lenses.
Yes, it includes a long sliding quick-release plate with both 1/4"-20 and 3/8"-16 screws to accommodate various camera bases.
Yes, the 75mm bowl design allows you to level the camera head quickly by adjusting the half-ball, rather than micro-adjusting the tripod leg lengths.