Looks not to be true, although I can't verify this. A commenter posted the following hours later: I was there and filmed it. He did not fly the printed engin

Looks not to be true, although I can't verify this. A commenter posted the following hours later: I was there and filmed it. He did not fly the printed engine. The rocket you saw fly was a solid for testing GPS systems. The printed engine was run for 2 minutes on a stand.