The Chinook Owners Group forums on the Internet are great sources of information for all matters related to Chinooks. There are also a few individual Chinook bloggers like mine with more good ideas for improvement ideas.
These web sites are invaluable for anyone that owns a Chinook RV or is thinking of buying one. They are full of resource information like manuals, and contain solutions to almost every problem owners have encountered with their units. There are also many ideas for improvements, many of which I have included in my own restoration and maintenance projects for Harmony.
Here are some links:
Yahoo Chinook Owners Group (oldest and most extensive): https://groups.yahoo.com/neo/groups/ChinookRVOwners/info
Chinook RV Forum (newer with easier organization and growing all the time):
Chinook RV Club: