Also, they have shorter feet so you need less whipping and thus less epoxy...
soooo..in answer to your question...i dont think so.. 
..remembering that you use a smaller lined ring than a snake.. 
Hmmmm! What about Knots
Derek I would Concur with much of What Rob has said, you'll find the Sage has Hopkins and Holloway Snakes on it (thats all they use
) Same material as their single leg ones
The powerhead will have cheap Chinese copies which are often plated brass instead of Stainless steel and do wear out very fast, especially on higher line weights.
To be honest i don't think on a 10ft 7wt rod ,you will notice any penalty in weight whatever rings you use.
If its my opinion you want then i would probably remove the single legs and fit standard stainless/chrome snakes with the tip section done in fine wire. use the old whipping point for the bottom foot and redo the rod thus. I'd get the rings from
www.guidesnblanks.co.uk The way you tie flies , you should have probs re-doing the rings
Sandy
