Wow, four summer-runs in a day! ONE time I caught three on the willy in a day, out of the hundreds of days I fished.
I just hope this isn't a slippery slope. There has been some murmurs of eliminating the summer steel plants in the Willy basin since they interbreed with native trout and winter steel (albeit at a low level). If you do catch the marked fish, I'd say retain them if you can and take them out of the gene pool. Plus, they taste great!
Best,