I have SA100, it only lasted about 20 flights before the bearings rusted, it ran but made a scraping noise, Horizon didnt cover it,bearings are not covered under the warranty. The cost wasnt much but I was surprised they werent covered. Using the higher nitro(20-30%) is rough on a glow engine, even the fuel tubing doesnt last very long. I took a fairly new fuel tank apart to do something and noticed the tubing was getting mushy,never happend that soon with 5-10%.Another reason to go G-A-S.