......may i suggest that you build in about 10 MOA of droop and design it to be reversable?
Here's a pic of my setup on a 12 FPE HW 77. The rail has 30 MOA of droop which is perfect for this rifle's ballistics. However I think you can see that it isn't reversable.
I have had guns where i had to install the BKL D-7's backwards to get the scope to shoot nearest to it's opticl Zero.