Hey, not 100% sure which bits which from your code, but surely you need to just add the tilt to the arm with the chairs(gondelarm...?)
it'd be easier for you to create this all as 1 model, and use bones to achieve the effect you're trying to make,
if you can't get this sorted, and you don't mind emailing me what you have, i can look into this for you
MrGuest!