Whomever designed clothes dryer vent duct engineering - has to be a sado-masochist.
You can't attach the ducting unless the dryer is 2 feet away from the wall, everything is an inch off the freaking floor, and even if you get it attached...how on God's green earth do you get out from behind the freaking dryer?
Then there's the whole sizing thing - and the way everything attaches.