I forget sometimes that the world is bigger than my neighborhood3mm
Dude, I live on the other side of the world from you! You're looking for a piece of 16mm rod or possibly steel pipe or even a decent-sized construction bolt - where would you usually begin to look for something like that? A machine shop? Plumbing supplies? A hardware store? Maybe the place you source the box section will have something you could use...
No worries, and you will certainly find something somewhere. All goodI forget sometimes that the world is bigger than my neighborhood. I'll have no problem finding something. Thanks for all your help