Pizon,
I don' t mind at all your asking for the source of my info. First and formost is the rule book issued every year as you register membership. These same rules are published on the IBO web site as well as their year book. Secondly, I do as you are doing now. If I am unclear as to how a rule applies in a special situation, I seek answers from those with either the experience or position to know the answers. Third is from experience in functioning within those rules and situations. I am, and have been competeing for a while, in addition to serving as president for our local club. I have volenteered my services in years past, to aid the IBO and host clubs when and how I could. As of recently, I have also joined the IBO team to serve as a state rep. I hope you find me worthy.

The situation you discribe is far from unique. The re-adjustment of equiptment while away from the tournament range is common place. The rule exists simply to prohibit someone from using a fixed pin setup in an open class manner.