I learned this doing the secondary wasteboard, made a joke about “design elements, not screwups” in the video. 
Agree that it needs to be either center-to-center spacing or there should be more clarification. If nothing else, maybe put in a couple of radio buttons that let the user choose either center-to-center or spacing between.
Trying to come up with more. There’s a couple little tips and tricks, but it’s going to be tough not making every project video the same. A minute of design, a minute showing Easel, a couple minutes showing carving. Gotta find a way to make them unique. I’m looking forward to ordering the upgrades when I’ve saved up though, that’ll be awesome.
