Pipe work and new shower

[marsaday]

I am fitting a new shower in my bathroom. I have bought an aqaliga external valve.

I intend to run the pipework in copper, but when i come to the last elbow in the wall which will bring my hot and cold through the wall, should i use speed fit elbows here to give me a bit more flexibility when i come to couple up shower?

 

[PrenticeBoyofDerry]

You say you are running pipes in copper in wall, will they come in contact with limestone, if so you could have corrosive issues and would recommend coated pipes.
I wouldn't use speed fit elbows either, I assume you are tiling the walls.
Not sure what an aqaliga shower valve looks like?

 

[Charnwood]

Aqal means hut in Somali, so it's possibly a shower for a hut.