Cal,
I live near you, pop round if you like and I will show you what I use.
I have used fexible wire for years (about 20!) but recently converted to solid wire leaders. The Orvis shop in Banchory actually sells them!
: I was stunned!
Failing that, I have used 50 pound wire. Seems heavy but it does not put of the Pike and it does not kink when using BIG flies, unlike lighter wire. If you crimp the lighter wire you can get a kink form at the crimp and the wire pops on the back cast!