Hi I have fitted 2 rails for the Australian importer and the top angle is up the $hit. no other accessories will fit the rail including other scope rings. They are not worth buying at 1/4 the price for this reason only. I also don't think they will rectify it as the blanks are machined extrusions.
Contact Glen Seekins he is above board and supports us long range shooters and his products are as good as the best and maybe even better.
search seekins precision
or find him on this site.
The USO anti can't is awsome though I would definatley use them I actualy am using 2 at the moment.