It will always be a great idea if you can open up only one part of your iron railing and set it up in your home in order to get an idea of how the finished railing will look once everything is installed. This will also allow you to be able to make a final decision regarding the design and to see if you need to return the railing if it is not going to create the look you are after. You will be able to save quite a bit of money and time if you do a little experimenting before installation.