Here’s #2 & 3. You can see they break right through the hole for the screw. There’s only about 1/8” of material taking all the load so it’s a clear weak point. I think with a minor design change to the geometry here and the plastic brace would be just fine. Then again maybe it’s the design intent...
Like I said I’ve got a design I want to try out, so we’ll see.
Are those V1/V2 braces? I thought the V3 got rid of that nut hole...