We didn't want the seat which is standard in the Dutch Star. Newmar warned us that if we changed our mind later, it would be difficult to install because the support is tied in with the wall supports behind the shower enclosure.
Don't know if that is what they are doing for you, but that is what they told us.
Paul, Christy and Leap
2017 Dutch Star 4018, 2017 Jeep Wrangler