Hi, First off nice bird! But it is miss behaving! For what it is worth I have been scratching and flying scratch built large scale ww1 airplanes, N28s, Dr1s, N17s, for about 10 years now. I belive in the ASAP rule..as straight as possible. It is true that out of allingnment planes will fly..I have flown a few myself but....I also have found that the ASAP rule is worth the effort. I would get everything as close as you can to straight and any wash out in the wings equal. I have never flown a golden age, WW1 model without at least 2 degrees, or a little less, of right and down thrust in the engine. This is a good starting point and in all honesty I can not imagine flying that type of model any other way. You could get it straigh,t if possible, and start with a degree or so of down and right thrust in the engine and see how the bird responds. Then go from there. If the wings and verticle incidence is correct to the centerline and any wash out in the wings are even this should solve your problems. You might want to check the latteral balance too although I usually ignore it on this type of model with one exception when a Dr1 I had had balancing weight on the left side of the fire wall, It was the only place to put it. Getting this Dr1 balanced latterally made a difference in how the bird flew at slower speeds ...it would fly even out of latteral balance but could get scary at lower air speeds. Best of luck !