Hi Wizzel,
Thanks for the enquiry.
For me, I made up each halve of the Conning Tower Railings, and made them fit with test fitting numerous minor adjustments.
I think joining before the two halves before attempting bending might be a bit too ambitious.
Like Haddock says, don't try to be too ambitious.
It's better to have a good result, and then learn from the good result, to have an even better result next time.
Cheers,
Bigkev