Grit in intake. Advice needed.

[Dwaynos]

Today I decided to remove my intake pipe to get some measurements and noticed there was grit entering the turbo on the right hand bank, (facing the car). I removed the intake as far as I could up to the turbo and cleaned it out as best as possible. I don't think the airbox had been screwed down properly in the corner due to it being a pain when in the car. This obviously allowing grit to enter after the filter.

The turbo impeller has taken a slight beating from this and just wondered if I should be conceded about cylinder walls etc. Hoping one of the engine builders on the forums could maybe chime in, any advice would be appreciated though.

The images show the extent, the other turbo is untouched.

Thanks