Whether the dog has a harness or a collar in day glo makes no difference to the training. The Bavarian Club in Germany have some, if not the highest standards to adhere to. People who make a mockery on an open forum about such high standards are not doing themselves or the breed any good what so ever, they are also to a certain extent bringing this site into disrepute.
I have a harness in day glo red that Todd wears when tracking in the evening, in dense cover with a torch its easier to pick the dog up, although this is his second harness, as he has worn out the first one.
You never stop learning when you have dogs, and for anyone who comes on here and keeps knocking everyone who wants to trail their dog to a standard laid down by the UK BMH or the German BMH Society it is not welcome on here. It is up to the individual how they want to train their dog and their business. If you want to trail your dog with offal well thats up to you and if this is the way you have trained your dogs in the past thats fine by me, but Bavarians are a little bit different