Brevis-to-rails Mount Question

[Look 1st]

Hi, could someone that is using the Brevis-to-rails mount on 15mm rails please tell me: does the mount securely mount to the rails? any slop or play, or is it tight?

Im asking because I thought I read somewhere that the Brevis rails are 15.8mm~

Im sure Cinevate would have it so it works nicely with the 15mm rails, but im just checking :thumbup:

Thanks