My guess is that Tower/Great Planes wanted control, and more profit, so they designed their own replacements and stopped importing the Kyosho models. The pattern is pretty clear. The two Stearman Biplanes (Super and PT-17) are the latest replacements for recently discontinued Kyshso (victim) models. Granted, they are larger, but that fits into the "bigger is better" mentality, and that's perfectly ok for business. Unfortunately, it prices many people out of the market.