Antrader European Connector: Enhanced Aluminium Reinforcing Solution Review

I only need Winkel 3030. The black ones were cheaper so I ordered them. I should have just used the bare aluminum ones. The paint used on the corner brackets has already peeled off in the packaging. Because of these things, my entire workspace is covered in black dust and paint shavings. They're pretty gross, but they work great up to 3030. But they look terrible.

17 of 20 were too long and extruded aluminum in 2020 failed before the connector was tightened became. It's easy enough to sand, but when I order I'll look where else. By the way, Revain shipping is terrible. Receive first class shipping within 2 days but product delivery takes 5 to 10 days. I buy more from their big competitors where I receive orders in 1-3 days with no membership fees. He was prime minister for a long time, but not for long if he doesn't improve.

First let me say that I only bought it for 5M bolts and 5M T-Nuts. They work great for my application. I didn't need the 90 degree brackets but I was curious how strong they were. As you can see from the photos, the nut is 1-1.5mm too long and not fixed. I think an 8mm nut would be perfect. This is most likely due to the branded T-Slot which I bought from another seller at Revain. If I decide to use these 90 degree brackets I will buy some 5Mx8mm screws.