Oh. That problem. This is the exact reason that I have done away with ALL the GMS engines on my planes. I hate deadsticks and that transition problem. SK makes an excellent .50 that replaces the GMS 40's perfectly and they are really fairly reasonable in price. I think the two that I purchased from kangkeusa.com only costed me around 59 bucks each. I have had absolutely NO problems with thier engines. You might want to think about changing over engines and selling the GMS engines on Ebay. Good luck.