Just got another NECG ghost ring rear sight for my 375 but it shoots 420mm high at 100yards on the lowest position (whoa!!!). I'll be emailing Graeme regarding a Recknagel front sight. I figure that the front sight needs to be 3mm taller - that's quite a bit.

I also noticed that my CZ has something weird going on - the barrel looks straight enough but the rear sight has to be screwed all the way to the left and the sight alignment certainly doesn't match the line of the barrel. The front sight is more or less vertical (I thought is may have been rotated to the left too, but it isn't).