Nice job, Not to rain on your day or anything but you could have gotten a fiderglass repro. done of that fish and released it. All you would need is length and girth mesurments and a few pix to work from.
As I understand it once the skin is preserved it is then painted to resemble the fish.
Anyway just a thought for next time, Congrats on your steelhead I hear they are hard to catch![up