Dan,
After the meeting last Thursday I went home and ordered a Jig XL, it arrived Saturday. While I did not receive a medium and a large like you did I got the large one only. It went together quickly and is VERY sturdy.
Also Saturday I received the Hobby Boss 1/48 MV-22B Osprey model and it will be held by this Jig XL while I work on it, that’s for sure!