Congrats on the conversion.

Your method of conversion seems a bit over the top though. I recently got 7 of my 10 live feeders to switch to frozen thawed on the first try and my method was a bit simpler. Snakes generally take changes better if they are done in steps. I got my snakes eating live rat pups before I attempted to switch to f/t rats. Yesterday I decided to try to switch to frozen. To prepare my rats I did the following: let rats reach room temp then dunk them in hot water for 2-3 minutes without a bag. One of my live feeders is a carpet who is still eating fuzzy mice so I didn't try to convert him. 8/9 of my ball pythons immediately grabbed the rats. One wouldn't but she's a stubborn eater and one of the ones who grabbed the rat decided he didn't want to swallow it.

I can also speak from experience that you are much more likely to get mistaken for food when feeding in a different enclosure. I used to feed outside of the main cage but every time I tried to put them back they would come after me like I was food. I now feed everything (including my boas) in their enclosures and have yet to be mistaken for food. Some of my babies will strike at me defensively, but that's normal.

If what you are doing works for you, then keep doing it. Animals don't come with manuals.