Glad to see you are having fun, and it's never bad to make a buck or two. I remember the first couple of times that I successfully "swapped" an engine. Figuring out all of the variables could prove to be a task. (shaft length and diameter, blade set-up, and cable orientation) Initially my time investment greatly outweighed the monetary gain, LOL. But no form of education comes "cheap". There is noting like the feeling I get that comes from admiring my finished product. I also enjoy repairing things because it saves them from the dump. It seems that everything is "throw-away" these days and anything I can do to limit that is a win. One thing that I learned early on is that there is an endless resource for equipment out there. (people throwing things away, customers leaving or donating, or people just dropping things off, and a small want ad where I offer a fair price for stuff that is high on my list) I have gotten much better at picking out what to invest my time in to make the most money. When I got this one, it was in really rough shape. Soon, it will look like new again. (Hopefully anyway)