I'm a new '76 Excella owner. I have the original bound owners manual and the '77 service manual, which is a wealth of information. I'm trying to figure out how actually "original" my trailer is BEFORE we start making any kinds of changes. It also came with a alot of original paperwork for the appliances, etc. Some things I have been able to identify by looking at the books, but most things, I have no way of knowing. For example, I know that I have the original blender/sharpener/mixer thing and the central vac with dust bubble, but when I tried to replace the battery in the clock, I found a cheap WestBend glued in it's place. Now I'm wondering what else has been replaced and I would never know the difference. Any suggestions for places to look? Is there paperwork with specific options available?