The cannon terminators are a pia...but I got mine set up 5 years ago and never had a problem. But I took my time one night in the garage and made sure I did it right.
Make sure they are tight out of the box! I bought 4 a month ago and one was sloppy loose where the base meets the swivel part. Exchanged it against the eBay merchants request that I warranty it through cannon.
We were out there in the afternoon. Riggers at 75 and 90. Mag dipseys way out (230 and 355) with meat and a 600 copper. Took a 20 lbs laker, 2 small steelies and a 10 lbs King. Worked 150-290. Temp was deep. All hits were on spoons. And one steelie on a flasher fly that was stacked under a spoon. Fleas were really bad!
A buddy of mine says he learned a trick down in Florida. Soak any fish in almond milk over night and it takes the gaminess out. I will stick to perch and panfish myself.
I don't run a ton of backing so I tend to tight down on hot fish after a few hundred feet get taken out. I have popped a few off on 20 in the late summer on long coppers. Early season I run 15 or 20 on the shorter coppers and cores.
Warrens hook line and sinker in Sodus Point still has a bunch of NK spoons for sale. I picked through them awhile back and I believe they may have the one you described.