Was wondering if anybody has ever had any trouble with compatibility between the topeak baby seats and other mtx stuff. I want to buy a baby seat and rack, but have a exp model trunk bag that someone gave me. Will the trunk bag work on the rack for the baby seat. I have read on other sites where this is sometimes a problem, but was wondering if anyone had any first hand experience. I commute and to get a rack that will work for both applications. Thanks.