Thanks for the advice. Regarding the gasket did you put yours on the engine block and then fit the blanking plate, or engine block -> blanking plate -> gasket -> egr valve?
How are you getting 67mpg as well? I can only manage about 53 on a good run (and I don't have a steel foot!)
My fingers are quite skinny so working with fiddly items and in tight spaces is one of my plus points.