My players have just finished their first mission (without too many screw ups) and upon hearing there would be downtime for the characters before the next mission started talking about what to do with their downtime. One player is a Technologist and another asked him to make him a Magic Item. I want them to have some creative freedom, and I like the idea of letting them craft their own items, but I was wondering how this would fit in to the Magic Item Requisition limit, or if it would be ignored, since it is not being requisitioned. What sort of limits could I put on the players (besides financial and time)? Or should there be no limitation? Thoughts?