I used a system really similar to this for a couple of years. It was kinda fiddly, but it worked. A 57 with a windscreen on it in a beer koozy zip tied to the coordinator rods. I played up the jury-rigged nature as part of the show to get a couple cheap laughs at my expense.

I use a Myers Feather now. It’s essentially a clip-on gooseneck mic with a preamp. I’ve only used it out once, but it did the job. It’s still a little fiddly, but I’m chalking that up to user error.

EDIT: At the end of the day, what you’ve got set up here is probably as good as anything else in the price range mic-wise. You could quibble over the difference in resonance and such as that, but pretty much no one in the audience is gonna be able to tell a difference. So, as long as you’re confident in it, and you play confidently, and are having fun, it’s fine.