Forget The Saito 150s unless u plan on doing in flight refueling. Those Saitos drink fuel like u wouldn`t believe. Best bet is 2s diesel. They will swing over a tree with no problem in a smaller size for a longer time on less fuel. Now how is that for losing weight. eg you can use 2 75s diesels and get the same power as the 120s Fs or use 91s diesel 2s and get more power than the 120 Fs. All using no more that 8 oz tanks that will last about 20 mins or more depend on your settings .