The 26G pipe could be a good match. If anyone tries this, please share the performance and handling data. In the case of the tests that Matt and I have run, the ES40G was used because it's what Matt already had on hand from his ZDZ-40 project.

Just keep in mind that smaller volume pipes tend to be peaky compared to higher volume designs and will tend to run hotter. You also may get a little more power out of the 26G vs. the 40G. I will try the 40G for now, because I did like its manners during the one test flight we were able to squeeze in last weekend.