Test will take a while.

I got the fly line Tues. afternoon. It is made like a tube. The plan was to insert a needle through several inches of the tube and pull the spectra through. Using the fly line encased Spectra I was going to tie it to a thimble with the fly line cushioning the Spectra from itself thereby improving it's knot strength and being able to use a simple knot. I found the process on "Paul's fishing kites" web site. He used 80 KG dacron fly line and 37KG Spectra and got over 90% line strength using the fly line protected Spectra and a granny knot. I Tried using 40 pound Spectra and 20 pound test fly line. It's so small that the needle barely fit through. I'll try some bigger fly line in the future.