Just a suggestion of something to try that might be easier and lighter: 
Put a 90 degree bend on the very last bit of that .062" mild steel. 
Even a 1/8" flange does an incredible job of increasing the rigidity of
a section, and it moves the most common origins of stress risers (sheet
edge cuts) into a much cooler and less stressful area.

 

Good idea............

 

After slashing my ankle open a few times on that pipe.............................

 

I welded on a 3/8" rod all the way around the opening. I still crashed into it once a week, but it didn't cut me after that, and it never cracked.

Lynn E. Hanover