May be of interest;

QUOTE

I am sorry to hear that some people have had issues with our Powerflex
material. I guess you'll never get a material (or a fly line) that
everyone likes. In our tests it is still the strongest copolymer
tippet material for its diameter out there and it is certainly the
best selling tippet material in the US.

If you have a problem, it could be an old material, or it could be
that there is a tiny burr on the inside of the metal grommet we put in
the restraint that the tippet is threaded through - we have seen cases
of both.

We certainly have no problem in replacing the material for certified
new stuff. If anyone has had a problem and wants to try a new spool
just shoot us off an email with what size you want to try and we'll
send you a spool. I am actually away after today for 10 days, but
email Zack Dalton ) and he will take care of you.

On the subject of tippets, you should check out our new Extreme
Tippet. It is very, very strong for its diameter (5X, 0.006", 0,127mm
is 10lb and 3X, 0.008", 0,203mm is 20lb). The best thing about it is
that there is zero stretch, so you should see the increase in hook ups
when fishing streamers and lures, or the sensitivity when Czech
nymphing. It is black in colour, but having used it all summer and
caught plenty of fish on streamers, wets and nymphs I know this is not
a problem.

Be careful though, it is so thin and strong that it will easily cut
into your finger. It is a fine dyneema type braid, so you also need
suitable aussie clippers or serrated blade scissors.

I just thought I'd throw that out for you...

Cheers
Simon

UNQUOTE

QUOTE


That's a good point! I should have made it clear that it was the
Powerflex I was talking about with ageing problems. You are dead right
about 100% fluorocarbons, they have a half life of nearly 10,000
years, so there is no chance of an old spool being the issue! Maybe
the burr, but since we discovered that I think we have got rid of that
problem!

The only knot that is stronger in FF than a triple surgeon is a
quadruple surgeon. It adds about 6-7% to the knot strength.

I am sure you know the rule of fluorocarbons "lick twice and pull
slow". If you follow that advice you will have few knot issues. Never
jerk a knot tight with fc!

UNQUOTE

It seems a fair number of people are now recommending this knot for
attaching flies to fluorocarbon tippet, after having problems with
breaks ;

http://www.flyfisherman.com/skills/lkknots/index16.html

TL
MC