I was at an agricultural show today and among all the big equipment I saw a Lane Shark mower. It's designed to mount on the FEL of a compact tractor and run off appropriate CUT hydraulics of between 8 gpm and 20 gpm. They put the appropriate hydraulic motor on the unit to match your tractor capacity.
Lane Shark USA The Only FEL Mounted Brush Cutter Designed For The Midsize Tractor
It's a rough cut front mower, off set mower and a vertical brush/tree limb cutter. Interesting piece of equipment.