Hello im new to this but here we go.In august me and my wife ordered a 17.56 and was told it would be ready for pick up late November.But this week I had a phone call and found out that haven't even started yet.So it turn out mid December now which means two days late into my 7 weeks off.Not happy, but this is where my questions come.They tell me I can make changers still for another week before they start.So wondering if I should change the coupling to the shockproof swivel type?also should I get another external table fitted.They say the tow length is 6864 mm is that including the rear bar ?my shed is 7200mm so im thinking about getting the 300mm extended a-frame which should just fit by mm`s.Other extra`s are big fridge,roof air,external shower,external fold down table fixed bunks with draws under it, shelves in robe,privacy screens,plus show special extras. thanks for the help