Thanks guys ,
for the comments.Victor,the WW1 Brit helmets are an interesting shape.the brim is fully round but the top is oval,thats why the brim is shorter at the front and back of the helmet while wider at the sides.well that according to the helmet i have in my small collection.
Mike,if your keen to tackle a bust or two,i can send them your way.While your painting i can do some more sculpting.
Andy