Slightly off topic, but this may help with your "extensive renovation". I have an original 631 page 1975 Airstream Service Manual that covers everything. Send me a PM id you are interested.
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Sail on silver girl. Sail on by. Your time has come to shine.
After living in Europe for a while, I too very much am in favor of using the bidet.
You might want to check out the GoBidet 2003C we use that at home, with the optional hot/warm water kit. http://go-bidet.com/
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