The other day I finally read the article on CCF and tested my two fly rods and was really surprised. Between a Lamiglas Perigee and Rainshadow RX8 I found the following:

Lami PF1025/6 - 8'6" 2pc, ERN 6.9, AA 62, CCF 90; 9 Alconite guides, #12sv stripper, #10sf, 7, rest 6s; Permagloss finish.

Rainshadow XF1085-3 - 9'0" 3pc, ERN 6.2, AA 67, CCF 80; 11 Alconite guides, #16sv stripper, #12lv tamer, #10sf, 7, rest 6s; epoxy finish.

I was really surprised the Perigee "outdid" the Xcel on frequency and I assume that would mean dampening as well, particularly given the much more moderate action of the Perigee. While the Xcel was finished with epoxy, I am very carful to make it very thin (no footballs). While I haven't weighed them both (the Xcel has finished just over 3.5oz), I don't think the Perigee is lighter at all.

Is the difference because of modulus? Length? Anyway, I'm really starting to like my Perigee. I am also thinking I may go to Permagloss for all my fly rods if the finish alone is effecting the dampening this much.

Marty,
I would expect the Lamiglas to have a higher frequency. It is shorter and a little more powerful. Everything shows up in the frequency, length, power, action material (modulus), but length has a large effect, the longer a rod is the lower the frequency is going to be all other things being equal and power also has a significant effect, the more powerful a rod is the higher the frequency will be all other things being equal.