Special handling = gate dispatch according to the AAA article. It may also cost extra since they carry it from the counter to the plane.
After rereading your post: the Comair flight should be a cinch if you can get the thing through security. Comair flys Embraers and RJs. Since the planes are smaller they are very good about accepting your carry on 'at the wing tip' and tenderly
returning it to you as you deplane.
Now about the Delta segment ...
Jim
[This message has been edited by jimquan (edited 08-30-1999).]