Hi guys, I fly an extra 330L 67¨ wingspan with a stock st2300 spinning an APC 16x8 pattern.

I have run through it 2 gallons (5% nitro) already but still running a little rough on midrange and cannot get a smooth transition. The other day inspecting the engine, I realized that I installed a medium sized silicon fuel tube. I guess I should have gone with the larger diameter tube.

You guys think this could be the culprit for the poor performance so far achieved.