Swapping Mira element for bar shower

[Matt0029]

I plan on possibly swapping a Mira element exposed mixer. For a bar shower. The pipes extend 18mm from the Finnish wall. If I pull the olives off with an olive puller. I would be hoping then to fit the surface bath shower fixing kit. As long as there is a tiny bit of play on the pipes. I need about 25mm from finish wall to attach these thanks.

 

[Matt0029]

That's the Mira element I want to swap for a bar shower. Thanks