EnglishBob: Thanks for the tip, I will give the split verts idea a try. The way it's set up at the moment is the two sentry boxes are seperate props. The boom is parented to the the pivot post so that it can be raised or lowered and the sign is parented to the boom. The support post is parented to the pivot so moving the pivot will move everything together. Is there a way of limiting the movement of the boom? mrsparky: I checked out the link and it does indeed look like the above, although I used stills taken from the film Battle of Britain for reference. Would like to do an Allied type as well but have been unable to get any clear references with regard to WWII. Didn't realise Action Man had a fan base !!! Thanks for the feedback.