RE: PRIMUS Build
I came across an interesting video once, on VHS. It was by Bob Hunt and Bill Werwage (Robins View Productions in PA) called Balsa Molding Techniques. In it, Bob Hunt showed how to make a molded balsa LE like you would use on the Taurus. It was commonplace technique back in the Taurus' day. It was supposed to be quite strong...
I don't know if those guys are still around, but if you are interested, I found their old phone number at 610-746-0106 in PA.
Bob