I would expect you to over do it a well!!
I don't think I need very accurate information about air flow, so I will start with the three liter bottle. If I can find the right flowmeter, I'll get it and take better readings.
Thanks for the advise.
Keep us updated about your project.
Search ebay if you think you may need something.
It's best maybe not to know anything more than understanding a chart in a sales catalog. Not much more would be really needed here.
