Largely based on information from this thread, I switched from 5 decades of using mono to some new superlines and went fishing this weekend.

I spooled my ultralight with 6 lb Fireline, and was impressed.
I was casting 1/8 oz spinners much better than the old 4 lb mono, and this stuff is way stronger. The one time I hung it up in rocks I was able to pull it free. With the old 4 lb Trilene or Stren, it would have been a lost spinner.

I set up a lake trolling rig with 30 lb Power Pro on a Shimino Cardiff and caught a dozen rainbows ranging from 12" to 19".
I was afraid this rig would be overkill for trout of this size, but it was perfect for handling the blade-flasher trolling rigs and weights we run. My friends, mostly running 10-12 lb mono on open faced spinning rigs had tangles and line problems on and off both days. I had no problems and was able to keep my rig behind the boat while they messed with gear.

My new trolling and heavy crankbait rig.

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MOLON LABE