Pawel
I have been looking at your build. I never served on a M728, but got a chance to see one fire on Range 79 in graf in 1976. Looked like a 55 gallon trash can going down range and you could feel the concussion from 1000 meters away! Awsome sight. It looks like you and my son are doing very well on both projects. By the way, my son is Michael Brindos and he is building the AFV Club M60A1 for me. I don't do models anymore, my eyes are not up to it. I just order the parts.
Ray.