Before I bore you with the progress of s/n 513 I wanted to share some information that I found out about too late to change on my airplane. From your builders log I see that you cut tubing for your longerons and thought you had made a mistake by forgetting to reduce the tubing size. You did not know it but you did not make a mistake. Numerous builders have reported that the aft portion of the fuselage moves too much while in flight. There are two ways to fix this, add a second flying wire to the tail, or DO NOT REDUCE THE TUBE SIZE of the top longeron to the tail post. I thought I would let you know this before you weld in case you would like to make changes.