Bob,
I have never used that particular brand of Flouro tippet, only Seaguar.

On a trip to the Mo a couple years ago I did find that a TRIPLE surgeons knot (3 times thru) was needed for attaching tippet to mono so it didn't break too easily. Then the knot was quite good.

And as mentioned, I use the Pitzen for my tippet to hook knot for this same stuff and find I use it all the time now.

HTH some,

Jeremy.