I understand why IDPA would not allow shoulder or small of back holsters, but I cannot get why appendix carry is still out. Among the younger/thinner crowd there is a very high percentage of guys who carry this way. If IDPA is supposed to be more "real world" they should allow this. It seems that from a marketing and participation point of view this would help grow the sport. Being able to shoot without the goofy vest would be a major plus right off the bat.