I've been working on this for about 2 months whenever I have a chance. So far, it is very close to my google sketch up model which I had made lots of mistakes and modifications over 6 months. Here are some pictures of where I'm at today on my google account.
One thing that is difficult is transferring measurements off the model onto the camper since the computer is in the house. I've learned the 'measure twice, cut once" philosophy is even more important since the measure twice needs to be done twice on the computer model and twice on the actual camper.
https://plus.google.com/u/0/photos/109287005282295320233/albums/5746508387867256129
Jim