Have you though about 16L? I know Pacific makes a 16L gut, not sure about Klip.
I too use 17g gut mains, and on occasion have moved to 16L when playing on clay. It lasts a bit longer and I don't notice much difference in playability.
One thing you may notice between 17 & 16 is a difference in weight. I'm certain 16 weighs more than 17, but I don't have the numbers to tell you if it is enough to make a significant difference.
"Nobody beats Vitas Gerulaitis 17 times in a row" -- Vitas Gerulaitis, after beating Jimmy Connors on his 17th try.