The D-ring with rollers I've been using has been unsuccessful. I've switched to a dogbon snaffle with 3in. Shanks. The double joint is a much better bit for Blu, however there's no rollers so he CHOMPS alot.
I've been thinking of trying a Bosal for better headset, balance, etc, and 'being one' with Blu. Some tell me its a horrible idea. Others think different. But I want your opinions and anyone that has experience with Bosals, what are your thoughts?