I seen a new Gravely propane in action it was tuff out cut the 460 but seem dangerous to me with 2 tanks beside you and a possible leak then static or electrical spark boom.
2015 JD 920M 7-Iron Pro 54" 23.5 hp Kawi 3650 rpm's (GreenFleet 24/7 up time)
Stihl - Kombi KM110 - Articulating hedge trimmer & pole saw, BG Blower
Echo - 210, 225
5x10 beaver tail
Xtreme Trailer Rack 3 unit & motor supports
W.E. Chapps Trimmer Covers