(Note: Fan Art)
Just in case you were interested in Drawing Sassy Saddles without her dresses, Amy Keating Rogers has answered someone asking about her butt symbol over on Twitter. It's looking like she's just going with pins, which, oddly enough, has already been drawn by someone in the fandom (Image above).
Be in formed fandom. Some day this information will win you millions on a game show.
Thanks to j s for sending it!