Your Sun Ray is totally awesome! I love the paint scheme and thanks for the building tips. The full length fuse doublers sounds like a good idea. Unfortunately I already assembled my fuse. Maybe I will remove some of the lower cross sheeting so I can install some rear doublers to strengthen the stabilizer area. It feels pretty solid as is but some extra strength in that area couldn't hurt.

Spruce wing spars would add tremendous strength to the upper wing. I actually thought about using spruce spars but went with balsa as shown on the plan. I did add 1/16 balsa vertical grain sheer webs to the back side of the spars which adds a lot of strength. I also made the ply dowel plates extend from rib to rib for extra strength. Maybe I should install sheer webs on both sides of the spars. That would be extra strong.

Very interesting you knew Jack Scarbrough and very interesting a Sun Ray kit was once available! I didn't know a kit was ever available. I'd love to find one! I'd especially like to find plans for Jack's Delta Pusher. It was briefly described in the April 1978 RCM Sunday Flyer column. That column has the only picture or info I've ever found on this very cool looking model. Here is the picture from the column and a couple new construction photos.

Mike