PA:

I can also tell you that I have used regular lines on rods with small guides with not too many problems. I really only had a big issue when fishing in the winter. The guides would ice up in a millisecond. Try the Sylk, you may just love it but bamboo is like any other rod material when it comes to fly lines; it all depends on the rod. Your rod is slower than a lot of newer boo so a standard taper like a 333, 444, Rio Classic or Sylk is probably ideal.

BTW - I don't fish the Tully because I have the Saucon & Monocasy in my backyard. Wild fish and cold water all year long! You gotta try it sometime!