I just use the standard cheap jaw spreaders that you find at Dick's Sporting Goods or BPS.
When you catch these guys on a fly, they simply Inhale the entire thing, when the fish starts head shaking, you're lucky if the hooks exit and curl into the corner of the jaw.
Both these pics are 12" flies with 3 hooks, and both came out successfully with minimal struggle with the fish. First, keep the fish submerged in the water inside the net and gently lift the leader. Second, clamp the boga on the jaw, and if he starts thrashing like crazy, just let go of the boga and let the fish settle in the net submerged. When the fish is calm, gently leverage the mouth open with your bogas, and let the hinges of the spreaders pry open the mouth. IF he starts struggling again, I just release the fish in the net to avoid heavy damage. It may take a few tries, but once the jaw spreaders are in place, you gain access that is impossible without them.
On a fly, I've found about one in 5fish will be hooked past the first row of teeth. Being prepared with the right gear will minimize stress on the fish. The most detrimental thing I've found is bringing an active fish on board a dry boat deck....they go absolutely nuts. I take care of business with the fish in the net and water, and lift for the photo when the camera is ready. I've learned the hard way from novice mistakes and being unprepared for these fish.
It looks like you guys did everything perfectly. I hate that you had to clip the fly though.
