The only mower set ups I had ever seen on trikes were the old "reel" type mower gang set ups. I had only ever seen 2. One was a 3 mower set up and the other was a 5 mower set up. And the mowers were staggered either 1 in the front and 2 behind or 2 in the front and 3 behind. I don't know if these were from old golf courses or if the same people that made them from golf courses made them for the trikes? This was how they mowed golf courses at one time.
Nicholson 500x (Project)
Nicholson 185s
Nicholson 110 (That takes an atc70 tank)
Ascott 500 head/350x (Project)
Homebuilt Racer Chromoly Suspension 110 (Ragin Runt)
PK Racing Suspension 70
A+ Inc Suspension 70
AWS Aluminum 90 frame
Hi Performance ATC Suspension frame rd350
Hi Performance ATC Suspension frame 90