I must say that I really like my Cortland BlueSad indeed,SA are surely missing a trick by discontinuing the Kelly green.I still use my original 1990 original to this day.They made a slightly different version of it in the noughties but it didn’t feel quite the same. No alternative for me but the Cortland blue comes closest in feel albeit with a slightly slower sink rate.
On the other side of the coin Rob, I find I bump off a lot of takes with the low stretch lines when pulling trads for loch WBTs, even when keeping the rod up. I don't like any of the airflo inters for that type of fishing. A bit of give in the system helps my conversion rate.....could just be me though..Personally I never liked the "Cortland Blue" intermediate , as I thought it was too spongy and I bumped a lot of fish......
For sure Rob I totally agree and I too am perfectly happy to use the sixth sense lines for rainbows. I just thought the difference was worth pointing out...Confidence plays a huge part in fishing as we both know....I swear by Airflo Sixth Sense intermediates & sinkers and couldn't be without them.
As always fish what you're most comfortable with....simple as that really