"No screws or glue!" Crush ribs grip the permanent tubes. A corner will never pop off with the mesh on, but if it comes off down the road in disassembly or transport, just pop it back on! It is made to twist incrementally to disperse originating impact force, instead of cracking.
"Windy day is OK!" Just tip over your Eznets to keep playing: 4x6 becomes 3x6 and 5x7 becomes 4x7, so the game or practice goes on. OR you can anchor in the hole provided in the corner mold.
"Bottom bar" This design goes unnoticed. The bottom support rails extend further back than any other net of this dimension in the world. This ‘rear-resistance’ prevents tip-over: purposely designed this way.