I have arf version and when i installed the engine i also installed a quick filler valve so i dont need to take off the cowl or try to get to the fuel lines. You could get the quick fueler and install it and a fuel filter separate. here's the one i used but i'm sure that horizon sells something like it. http://www2.towerhobbies.com/cgi-bin...?&I=LXK135&P=0