The bolt is the lesser used rod as of now. The Xii3 has heavy use but the cork has held up very well.. The newer rods seemed to be more thin compact cork rings with some but not much filler (Iβm talking 2015ishβ year minus). (in my minds eye I feel like sage has some filler seal, just based on my previous history, but canβt prove itβ¦But some of the XP and RPL grips feel so much better imho but are more natural with slight voids and mini-pits after use. They are a thicker and dense feeling full wells not like some todays thin profile grips. Oh well to each their own)
Find what you like and cast that fly!!!!