I'm not pointing the finger as there could be many reasons, and a lot people have success with it, but for me, I'm never putting Frsky gear into any of my planes ever again. I've also switched to MKS where I can. But again, you use what you are used too and comfortable with. Just watch those antennas, on the newer G-RX6 and the RX4/6R I found they break right where the coax joins the mini clip very easy, sometimes I think it's not always visible.
I'm sure I've seen people using PaulJ method but under the tray so it looks neater and you don't notice it. I've flown a few Snipes and the Blaster 3 and never had a issue ever gluing servos in, even without scuffing the cases as I tried once. Always been a strong bond. I used CA and was easy to cut them free too.