Hi Steve working on this one myself at the moment, started early 2016 as a Somme centenary piece but didn't get it finished so went back to it a few weeks ago when Brian posted his recently finished version, its great to see that its still a popular bust, and a lot of painters do it as it means something a little bit special to them.
My only comment is that I tend to try and get a totally Matt finish on the clothing and webbing on WW1/WW2 subjects as it looks more realistic, I am still experimenting with achieving this, I paint with oils the end result can be in the lap of the gods but lots of tips on PF of how to perfect your results.
TERRY