Nice to hear a good news, Matt. No more waiting to get it back, but now waiting a good weather to test the performance.
Getting colder (2 deg C, 35 deg F) and windy here, We my friend and I just did test-run of my friend's Rock&Roll, which has OS GT33 with Hatori header and E40 tuned pipe, he just got from USA. I just set LSN 1 1/8 and HSN1 3/4, that Matt you reported here. Now we are accustomed to hand start right way.
It start to run nicely. After warm-up, it reached over 7900 rpm (18x10 Menz prop), then suddenly stopped with a big bang. The silicone tube connector between Hatori header and E 40 pipe was burned out. My friend did not have time to get a correct teflon tube connector.
Even without optimum needle set, E 40 tube shows better rpm boost than Hatori canister, which gave the highest rpm 7500 on LSN 1 and HSN 1 2/3. It seems that E 40 tuned pipe enhance more air(oxygen) staying in the engine cylinder, which then require more fuel (more needle open) to burn.
We did not reproduce your enhanced power boost result yet, but E 40 definately works to boost power enough for F3A plane.
Colder and more windy weather is forcast for tomorrow.
Wish everyone to have happy holidays