The connector is too small. I have to jam the upright pipe in, to make it fit, and the supports barely fit. As a result, the screws are almost impossible to start, and the support ends of the connector are flared, not flat to the pipes.
I tried to modify the project by using PVC, to save $ and weight, but had the same experience of it barely fitting. I thought maybe the diameter of 3/4" PVC was larger than 3/4" EMT conduit, so I returned the PVC and picked up some conduit, but NOPE. The connector is just too small.
I'm going to get it together, and use it as is, but I'm not stoked.