Anyone use these? Ive just invested in happy mouth fulmer for mine, do i need keepers? It looks like this would alter the natural way the bit fits and cause a bit of pressure thats all.....Never used one before!
You're right. You do get a slightly different action with the keepers on. With keepers the bit is 'suspended' more in the mouth. I don't know what mouth piece you have though as it makes a bit of difference but basically you'll get less pressure on the tongue if used with keepers.
Using it without means you'll just get what you would get with an ordinary egbutt/loose ring (depending again on what you've got)