looking at the SRAM re-engineered hydraulic disk STI options for my CX/drop bar hybrid/gravel tourer and same for Shimano CX 105 both are 11 speed and I like the idea of going compact with a big rear cog from my current MTB touring triple with its not very smooth front changes

Have a set of wheels with 2013 X0 hubs – looking at the SRAM spare parts catalogue looks like can change the freehub body from 9/10 to 11

….but the technical manual seems specific to X0 2014 – any ideas of the body can be swopped on older X0 hubs?
Run 2 sets of wheels so if can avoid replacing one rear that makes a cost saving