If you could give a model number of the TT I may be able to help with some assistance. We have a 2006 Innsbruck Lite 25RSL that has a rear slide. I have tested the manual extension/retraction function of our slide and it works easily (but VERY slowly!!). Not sure if yours is the same though. As ours is a 'Lite', we don't have the electric water heater capability, so I guess I'm no use there

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BTW,
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1999 Chevy Suburban C1500 --Seating for 9 when we're moving
2006 Gulfstream Innsbruck Lite 25RSL --Sleeping for 9 when we're not