RE:clear intermediate to backing connection?
Not only do I use the same Albright knot and nail knot, but also the same name fly line. This is scary, Juro! Are we starting to think alike?
Wulff recommends that you not use a nail knot on their smaller intermediate clear lines.
Typically the nail knot will neck the fly line down some what to hold it from sliding off the end of the line. If you are concerned about failure, you can also heat a butter knife and touch the end of the fly line to form a small bud.