Forest, I have not done a Newell, yet, but I have installed wood on slides in a ton of other coaches with slides- either "flat" floor, raised, I can do it. I have to add a piece of plywood to extend the slide to cover the ramp gap and use stair nose trim to finish it out.
I had a metal company here in Sioux Falls cut some entry trim pieces. It turned out nice. I will take some pics before it goes in the cave for the winter and post them.
Todd & Dawn Flickema
Former owners of a Classic 1984 Newell
71 Karmann Ghia
Sioux Falls, South Dakota