mriya, don't get too excited by IAM elections unless you are personally counting the ballots. We tried several times to elect a mechanic slate, only to have the elections nullified at the discretion of the higher ups in the IAM. We did not vote AMFA in until we found out that it was not possible to change the IAM from the inside. The IAM does not follow their own rules.
On a positive note, many of the lower level IAM representatives were also AMFA supporters before and after the representational election, since they were more concerned with workers issues than union careers.
Eventually United will come around, but it will the take the backshops to do it.