Have you still got the manufactures fitting instructions. Did you see any flow restrictors in the package, they are normally colour coded. They are used in the shower inlets if the balance in pressure is not equal.
Does it mention any flow restrictors to the shower inlets in the instructions. before installing shower?
I still think it is crud in the hot water inlet filter
Does it mention any flow restrictors to the shower inlets in the instructions. before installing shower?
I still think it is crud in the hot water inlet filter