That's about 22 lbs which is what mine came out. I have a P-120SE in mine, and the weight is not a problem. With a P-80, you'll probably notice a little less in the verticals, but it should fly fine. You can take your overflow tank off right after you start up and start buring the wing tank and that will help as you have plenty of fuel - I do the same with my P-120 powere Euro with 160 oz onboard.

I would try and avoid adding the nose weight if possible with the P-80. You can save a few oz in the back of the plane with a Tam's pipe vs. the CARF one. You have enough of an investment in the plane to make it worth while.

A note of caution, DO NOT fly it with an aft CG! It is very easy to over control it in the landing approach and cause large PIO's, even with a correct CG. With an aft CG, it can get really hairy.

It took me a bit to get the trim with flap extension right and get the control throws and expo to where it was comfortable, but now that I have it dialed in, its an AWSOME plane!

Bob