I dont really have an opinion on the iam medical. I know nothing about it but im trying to find contracts that have the iam medical. WeAAsles may be able to help as he is a decent researcher. The only union medical that i came across was proposed with the teamster mechanics at United. There was alot of bait and switch in that language and i felt that united managament got something or allowing the teamster medical. Not sure if it was ever ratified though.
But our contract language will determine if i want it or not, should it be included.
The union would prolly sell it as "hey you are the only group that has a union medical...gosh!"