I haven't yet as the last batch that also didn't develop (and now I know why), just finished a few days ago. So I had just assumed that the problem was with shipped eggs. I wonder how many times the USPS gets blamed when in reality it was the incubator causing the problem.
The lesson to be learned here: The cheap comes out expensive. I was just so tempted by the low cost of the Brinsea incubators.
Oh and lesson number two: If using a cheap incubator for this hatch-a-long, check the temp every 15 minutes.
That is a very good point!
Many will spend a lot of money on eggs but not much on the incubator, candler, thermometer or hygromenter.
I have heard good things about Dickey incubators.