My only YS is a 120 SF that my dad got for a Goldberg Extra when I was 16. I am now 36 and I'm flying a new Golberg extra, our third between my dad and me. I can't recall a single deadstick in 20 years. I made the mistake of using afterrun oil, so I had to get a new diaphragm for the pump and a new intake tube after crashing the second extra, but that's it. No engine has been so reliable or so powerful.