TR and Shawn,

Thanks for the explanations. I have never owned a DA but own several DLEs. I've been considering buying their 35cc basis what I've read in Flying Giants comparison to the OS GT33. The OS is easily stronger than every other 30 to 40 cc engines I've tested, but have not tested the DA35. If the 35 hauls the same props as the OS its a powerhouse. But since I have several 33s already not sure I want to spend the time and effort to learn things I don't really need and probably won't use. I don't know.....I may buy it and play with it anyway; I can always sell I suppose