ALPA is a mistake for any ACMI carrier.
Here's how it goes:
Your pay is low.
Your dues are low.
Your management are vicious blood sucking sharks, with frickin lasers.
Eventually, ALPA will tell you you're draining more money from their organization than you're pitching in, they will cave and tell you the c&ap TA is the best you'll ever do and pull their support.
But we all gotta learn our own lessons.
Good luck.