So, I finally got around to building my little brodak trainer after about 2-3 years of sitting on the shelf. Unfortunately the supplied engine mount is made for a cox babe bee or black widow, and I have a cox sure start. From what I see, the difference is that the babe bee/black widow use an attached fuel tank, whereas the sure start looks like it uses an external tank. Is that attached tank compatible with the sure start? If so, does anybody have a site where I can pick up one or two of them real cheap? Is it it just as easy to throw on an external tank? Any advice or suggestions are appreciated.