run it in much richer than the instructions say, start about 3 & a half turns out or more, if you run it in too lean you'll wear out the piston & liner. I posted a thread or two back along the way how I run my engines in. I run a RC 10GT fuel tank which has a built in fuel filter and an inline fuel filter as well. any fuel filter you get at your LHS should be ok. I run a simple failsafe as well, cost me 30 bucks australian and worth every cent. I picked it up when I got my fuel filter. your local hobby shop should have a few in stock to choose from.

Good Luck.