Dan I have only seen one plane fly with Diesel . For the mess that it makes ii I personally don't want to try it. It might work fine. A single tank would work but I would use a Perry pump for each motor. and don't use a presure return from the motors. I made new Necessels and motor mounts. When I get back I will take some pic of the necessels and mount and send it to you. I thought I had some but I must have deleted them . With necessels and the Fox 40 I had to add 0 weight to ballance. Did Cermark have them back in stock?