That's good then. I've had my blocks for a few years now and there were different SKUs for 115x and 2011 mounting, so I assumed Barrow were still going that route. I actually thought 1700 was using a rectangular hole pattern because of the elongated socket.
So just ignore me then!
I'm not actually too fond of the mounting posts though, at least not what I have. The M2 threads feel a bit flimsy to me when you start compressing the springs, but then again one one system I may have been cranking down a little too much to get the block perfectly level and make sure IRL dimensionally it matches the spec drawings and my CAD model (need sub-millimetre precision on a tiny build).
Gonna see if I can retrofit the mounting from an old EK Supremacy EVO, feels a bit more substantial.