Gus your car is the bollocks mate, one of my fav RS turbos ever.

I had an NMS 1600 cvh for around 7 years and it gave me no grief at all and was 100% reliable the whole time.
Was 300hp and 300 torque at just under 2 bar boost.
I loved it.
Weak point as already mentioned is the blocks.
I had a thicker walled series 1 cvh block in mine and it was as good as gold.
I was gonna take the power up further and change the spec but instead I sold it to fund going the Cosworth route.

Cheers Paul