Further headaches--it looks like the main hoop diagonal and cross tube are a different diameter than the main hoop. Those are all required to be the same size.
I'll second the comments on the welds--they look cold with poor penetration.

With a finger or a dental mirror, inspect for full circumfrence welds in all the tight locations (under the roof, behind the A-pillar, etc.

I tend to agree with the group--cut it out and and start over. Sorry.