Ok, I had some time on my hands while at South Padre Island to prewire a Bedroom fan in our 2600RB. Only fished or ran wire 3'. The Maxxair Maxxfans 5300K (bathroom) and 5100K (bedroom and kitchen) will be ordered when we get home.

All you need is a straightened coat hanger and a square bit to remove the existing fan/vent trim.
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Step 1. Remove trim screws and trim, put in safe place.
Step 2. Tape string or wire to the end of a straightened coat hanger.
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Step 3. Push the hanger under the insulation from one opening to the other.
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Photos of the Kitchen fan wires:
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The Maxxair Maxxfans 5300K (bathroom) and 5100K (bedroom and kitchen) will be ordered when we get home. I'll be ready to pull the old vent and fan when the new stuff arrives from etrailer.com

It did take longer to post this than the actual work, oh well.