jackall, you bought a great little engine. I started last October with the same (engine at least) and I've been very happy with it's performance and reliability. First regarding break in, follow the manufacturers directions, but get an electric starter. These ABN engines are very tight and mine took between 10-20 flips to start without an electric starter initially. Also when you're breaking it in on the ground alternate between 30-60 seconds of WOT, and 10-20 seconds of idle for 3-4 minutes at a time. Then shut down the engine and wait for it to cool down some (5-10 minutes), and repeat. Add more WOT time as you get more time on the engine.

I was able to run two 8oz tanks on the ground, and the engine ran well enough to go flying. You may need to play with the air bleed screw a little to get the engine to idle reliably. Remember that it works opposite of how your needle valve works though.

After you're done with the ground break in, check the tightness of all the screws/bolts on the engine. I've a bunch on mine vibrate loose. Definitely use thread-lock on the muffler bolts.