I have been to Treadleon and the information that they give sometimes is kinda iffy. I will say they do promote the use of the machines where as the NB is more geared to the preservation of the machines. There are a lot of very rare machines that need to be preserved correctly and never used nor altered. And they also cater to machines up to 1960 so its not just treadles.
I am a member on the NeedleBar and I know that all of the information there is very reliable and the people there are very informative and its like one huge family. The Smithsonian uses them for a lot of their own research and send folks to them all the time.
So that alone is saying something there! :thumbup:
Billy