Thanks guy for all the good information. I have looked at that site mentioned and it seems good. I do not know anything about this side of modeling. Old nitro flyer here and not too good at it. Built a lot of models in my time and control line flying so this all is a challenge for me. . . As mentioned my SIG 4-star has a flying wt. of 5.5 lbs. Do I consider that the guide for motor selection. Don't know the empty wt, without engine that is. Ok and contact me , if you like , at [email protected] Older senior here and that I can operate. lol Need a teacher like you. I find most of the fellas know what they have but not how to recommend . . . Even some of the well known shops said search for your self. So I may pester if you let me. Thanks once more..... Gary ( aka gphil )