i had a t-15 engine in my mt2 for about 8 months i tuned it the first time and only tune dit once more in summer cause it was warmer mine was ace held tune no problem then it blew lol but i will never go back to it my lrp engine fromt he when i started to break it in at factory settings i didnt even have to touch any needles at all it was litterly perfect its not to lean not to rich i have leane dit few turns but very little i would highly recommend and lrp engine to any1 top quality and not overly expensive.