There have been numerous threads about the LA's in the "Glow Engines" forum...You'll probably get an argument from others about what I'm gonna tell ya but...

I had one mounted inverted in a Cermark Bobcat (until I changed to a more powerful engine ) and it would load up and quit every time I throttled back for a landing. I love to shoot touch and go's and it really p'd me o.. ya know?! Anyway, I had the air bleed screw so far out that it fell out (!) and then it ran a little better...I drilled out the front hole to 1/16" and put a new screw in it and got some adjustability back...

You'll get probably a dozen other guys saying you don't have to drill it out, yadda yadda etc. etc. but I did and it worked good for me...FWIW