Hey gang, enjoying the building season? Question on fuel systems with a header.

I set my Sig Senior up with a header tank fuel system. A 40oz dubro main tank under the CG and a 4oz dubro header tank. I installed a third line into the main tank to fuel/defuel it. The header clunk line went to the Saito fuel "intake," the vent line on the header went to the clunk line on the main tank, the main tank vent went to the press. tap on the Saito's muffler. Does this setup sound correct?

I flew the airplane maybe half a dozen times and spent a long time tuning the Saito (I broke it in for about 45minutes using the manual instructions and the same fuel setup) . The tuning stuff I think was inexperience on my part. I got a tach and some help and we eventually got her sounding the way a good running Saito sounds. It is a sweet sounding engine. I wound up having a lot of trouble fueling and defueling it. The third line to the main tank never worked. I eventually got the fuel into it via the header clunk line. I couldn't ever defuel it more than a drible though and wound up using a bicyle pump to push the fuel out. This eventually forced the cap on the little header loose (I'm guessing) and it sprayed glow fuel all over the inside of my Senior. I've been spending more time than I want replacing/sanding out the soaked balsa.

My questions; Is this setup correct? Does a third linke to the maintank work on this setup? What is the proper way to fuel/defuel this setup? I'd love to set it up this way again. I think I can get 40minutes plus on this setup, probably more with that Saito tuned in right. Its a blast to fly and with the long flight times its super easy to get my stepson some sticktime. He tends to like his pz trojan though.