We installed the Splendide last week in our coach. Mike Flowerday helped me install it. The new 2100XC does have a lower dryer vent opening, and it's slightly toward the the front of the coach from the marking laid out by WRV for the dryer vent. Mike used a hole saw the size of the dryer vent, at a point directly out the wall from the dryer, drilling from the inside of the coach, and moved slowly through the wall to make sure he wasn't going to hit any frame member. He was prepared to stop at any point and pointed out based on the pilot hole going through the wall, he could move it to the point marked by WRV if he had to and still be within the area of the pilot hole.
The good news is that there were no frame members in the way for the new vent hole.
I screwed the drain pan to the floor and routed a 3/4" flexible tube from the drain on it down past the holding tanks and through the bottom of the coach a few inches away from the refer drain. I used a piece of metal dryer vent screen I got from Lowe's, wound in a tight roll, and inserted up the tube from the bottom to keep bugs and road grit from getting int he drain tube. Poked a small hole through the tube at the bottom and put a zip time through it to keep the metal screen from falling out.
The drain pan is very rigid, fits snugly around the washer/dryer, and since it's screwed to the floor, should do a good job of keeping the unit from moving around in normal travel.
Former Owner, 2006 36MDDS
2010 Arctic Fox 22GK Travel Trailer
2007 Toyota Tundra