Your answer lies in this article, in the paragraph entitled "The Dreaded Full Tank Lean Bog". Its a little past half way down the page. http://www.rchobbies.org/engine-tuning.htm
Take the filter element out of the filter, leaving just the hollow core attached to the pressure line (effectively creating a reservior). Then buy another filter for your fuel line too (leave the filter element in the filter on the fuel line).