have the matrix also and it would die at about 1/2 tank nothing worked I contacted cen they sent me a new tank and the needles for the engine now it wouldnt run longer then 15 seconds etc. So I pulled the engine and sent it in to cen as per thier request they ended up sending me a new engine that runs great. Mind you I been in the rc hobby planes helis etc for 40+ years and when a company does what they did it makes me happy and I will buy from them again.