80 bucks and about 15 minutes will get you flying- why go through all of the frustration to get that MDS abortion running right? Don't you want to fly?? Get a reliable, new engine out of the box, take it to the field and have someone help you start it. You'll be flying in no time. Why spend hours and hours on that engine? I am assuming your time is important to you. I have OS, Thunder tiger, Enya and a few others, and if an engine of mine goes sour on me, I spend a little time on it, but not hours and hours! You can learn about engine tuning as you go- you need to get FLYING son!