I've got these on the way
https://www.amazon.co.uk/gp/product/B017TZLYC6/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
which looks similar to this set of copic markers
although the BrushMarkers are 6 cool greys and 6 warm greys.
I'll let you know my thoughts on them for sure