I'm all about trying new things. I did just that on the Corona servos that were supposed to be so good. Turns out they have a HUGE dead band, I couldn't set the pitch or tracking on my head, and it was just a nightmare. Put the EXI D213F servos on it, and it was a little better, but nothing like it should be.
You can get a set of 3 Align DS415 cyclic servos for $60 shipped on ebay, brand new and in the package. I think you can find some Savox a little cheaper if you know what numbers to look for (I don't since I have always went with Align).
But I do suggest good servos. Learn from my mistake with the "clone project". What a nightmare that was lmao. And I was trying to do it "right" hahaha. Fail...