A:
I would not do it for trout and trout flies. I would use for bass or saltwater species not too sensitive to additional hardware.
Depending on what time of year, especially later in the summer when the flies are getting smaller this is a non starter for trout. Thats why I use flouro leader, 7x tippets, etc depending on how big the fish are where I am fishing. Trout with any pressure are too smart for this.