The DVIII has a small fast wing. Under 500 square inches compared to 750 sq in of my SE5a. Mine was at 5 lbs. Painted lozenge on Koverall and the wing had silkspan on it. Fiberglass cowl; OS 40 FP. It needed more prop and speed. I got rid of the Williams Brothers wheels, and made some out of 1/4" lite-ply with balsa tires, then covered in Koverall. It was all an experiment, but getting rid of all that weight down low really helped. My wing was pretty flat incidence wise but I never checked it; I did jack up the back some. I did see your video and it reminded me of mine, but yours looked a little better. Same Jasta 6. I was ready for my Dr1 to be a pig, in the air it is just shy of a regular sport plane. Biggest problem is making sure the tail is flying, because all those wings are flying before it does, and lifting off early made a mess once.