BeerCanuck, first off welcome to HBT!

Always great to see another Canadian on here. That's a good idea about painting the whiteboard. I was in such a hurry to get my kegs chilled that I didn't consider the humidity issue.
The tyvec tape probably wouldn't hurt but from what I saw when reassembling mine it isn't necessary. Once you get all the screws in, the gasket isn't going anywhere.
I've had mine running with kegs in it since saturday and my temperature has been completely stable throughout the entire fridge. I've got it set to hold at 7-8C and even down in front of the kegs my thermometer reads that. I've been checking the temperature of the beer that I pour and it's all at 8C as well. Maybe I got lucky with this fridge, seems like they aren't the most consistent in the world. I don't have a tower yet so I'm planning on having to implement mr x's solution once I do.
I may be lucking into a free 2 tap stainless tower for the cost of some beer.

Fingers crossed!