OK, you're frustrated. Now.......after reading 4 pages of this thread, I still don't know which F53 you're talking about. I don't know which Allegro you are talking about.
My last rig was 34 foot with a F53 20500 GVWR with 208" wheelbase , my new rig is 36'10" on an F53 24000 GVWR with a 252" wheelbase. Do you think they will act the same ? Where is your water tank? In the bed room to the rear of the rear axle or in front of it between the wheels.
I don't know if we can give you the answer you want, but you need to narrow your request.
jim