yeah i will definitely call ahead & bring another bit just in case !Please talk to the steward BEFORE riding your horse in one of these. Any time you are riding in a non traditional bit, even if it is listed as legal it is always advisable to get permission from the steward BEFORE. That way if there is any discrepancy, it will be sorted out before your test, and not after or during.
At one show, with a certain steward and certain judges.I. Did at a show and had no problems.