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Hilary Greenwood posted on the chat group:
When we picked up our new van Rex gave us a big bag with all the instruction booklets for all the components which we duly read and absorbed, but we were not confident that our sons would bother to study everything before they borrowed the van. So for our sons’ benefit we wrote a handbook explaining how everthing works in more simple language and including a FAQ section. The handbook is specific to our model. Rex has approved this.
you may also be interested in Alex Good’s version