Thanks for the compliments guys. The little one looks better in the photos than in real life - believe me.
Marco, the prop was changed from fixed wooden at least twice to variable pitch both wooden and I think metal for racing events along with the V8 and V10. Your photo is one such event I believe. The model was intended to be the V4 but there are issues with the placement of certain intakes below the wing to which I could not find proper references. There are a couple of issues with V7 as well as probably the leading edge slats should be shorter but I did not bother in the end. This was a pleasure build and I was glad to get this one out of the way. I found a photo of V7 as rolled out (my version) while considering changing from the V4 idea but as usual, I can't find it any more. I was particularly attracted to the half painted prop with the polished wood at both ends.