Have your lipo protected ánd a nice stand for your Realacc x210 Pro, just print this model in TPU or other flexible filament. Attach this protector with the two front bolts of the frame. Of course you can use some extra velco on the the lipo and frame to make sure it can't get anywhere during a crash.
I made this so it fits 4S 1300mah lipo's. It wil also fit 5S lipo's but it is tight. Make sure you use long enough lipo straps. I normally use 20cm-25cm.
I did not test it myself but people told me this same model can be mounted on the the original x210 and qav-x too!! The two holes are 31,4mm seperated from each other (center-to-center).
Here you find my new shopping list (v5) with al the parts you need to build the drone I fly right now. It's in Dutch but you can understand hyperlinks, right ;)