[wagonman76]

Looks like almost the exact same gain I got with my original tail. A bit over 5%. I lost the gain when adding the piece to take the tail the rest of the way out. I need to get some more pics of it soon then take the piece off.

Glad to see the back-side view, it really helps visualize what you are doing. What did you use for wrapping? It looks like you might have used a shower curtain liner like I did.

Same here, it is nearly impossible to do a quick a-b test, with all the hills, wind, and potholes. I just use identical trips that happen to have the same temps and weather conditions and use that for comparison.