DOES ANYONE USE A RUN STAND?

Garrett Ellison said
I prefer water. You can always pull the drain plugs out of the sides of the block after running it to completely drain it. Some people use a pressure regulator on a water hose set to 10 psi or so and a thermostat. But nevermind.... you're in Ontario... Coolant! Does 50/50 even work there or do yo have to run 60/40 or 70/30 ratios? I imagine you see more below freezing temperature than you do above freezing. BRRRRR!
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LOL.......I'm in Ontario 3 hors north of Toronto, not the North Pole! :) The run stand will be in a heated shop. I was just curious as to ant rust etc that may form in the block after I drain it. Also, any coolant ratio that I use will end up at the recycling depot. I wouldn't want to drain it, and put it in another engine even though it would only have an hour of run time.