Can't seem to find anything that tells you which Myler mouthpiece would be most suitable for your horse. Does anyone know of any shop/dealer/whatever that you can ring for advice?
It's really helpful! I've used it a couple of times for clients' horses and been given not only good advice but at least once an option I would never have thought of that worked out great.
In our area a Myler agent will come out and advise and you can try a few bits. The saddler stocking the bits should be able to put you in contact with them.