I have the same problem to a degree. Not quite muttoned withered, but definitely did not have a good prominent wither. I needed a new saddle anyway so did a wither tracing for the saddlemaker. Ended up with a wade style saddle with Arizona bars. When using this saddle on the roundback horse, I use a 3/8" wool felt pad and a single layer navajo style blanket. for all other horses, I use a thicker pad. It seems to work well on all horses I have ridden with this saddle. BUT, like SS said you should see if the bars are too flat or too steep for this horse before. I had never heard of his way of checking before, but that is what I like about these threads. Learn a lot of new things.
