I am installing balustrade for the second floor that my wife had
designed. The balustrade is L shaped and made up of wrought iron
newels. It is 6' long and 3' wide. I already cut the pieces and put
them in place to size it up ( I didn't glue anything yet ). See
pictures below:

http://bismarck.sdf1.org/balustrade_1.jpg
http://bismarck.sdf1.org/balustrade_2.jpg

At this point I realized that my balustrade doesn't include the
starting or ending posts and I am afraid that system will end up shaky.
My wife likes the lighter look of the balustrade the way it is.

Do you think the balustrade will hold up after applying the epoxy?
Should I replace one last newel with the starting post? Should I have
posts on both sides?

Thank you!!