One of the problems of the small 4 strokes is that they are not much cheaper than the bigger size engines up to the .52 range, so you dont save much. Material cost are about equal and so are the machining cost, so the bigger engines are actually cheaper for the horsepower or more profitable. Swap meets are the way to go unless you just have to have new. I remember a review of the T- craft with the .26. It was well liked, but because of the small engine it was very prop sensitive for good performance.