I may not know the answer that you are looking for as I have not seen the pictures or the bow. If some members of the board have seen the bow or pictures of the possiable problem and are unable to give you an definate answer I would suggest that you submitt the possible problem to the President of the IBO for a definate ruling. After reading the rules again I can not imagine what change has been made by the manufacturer that would be that hard to understand. If the difference is cosmetic there should be no problem. If the change is functional it must comply with the original concept of the modern day traditional bow as outlined by the BOD members responsible for making and enforceing the rules. This is not a "he said she said" issue but a question of following the rules. The BOD would have to hear any protest and I'm sure that one of them can guide you in the right direction. There has and always will be people that will try to beat you with the rule book for lack of skill. GOOD LUCK