personally i think that the Stanchions BE-2 are OK for beginners...!!
the best ones are the rounded ones that can be found in the Kit Lis Terkol, i am sure if you ask the Workshops they Probably have a load of these laying around, if not it would be a good suggestion for a new set of single Stanchions..
and yes the railing is from normal brass wire, as can be seen in the attached photo.
the best way of fixing the single Stanchions in place;
mark were all the stanchions go and then, hold the stanchion with a long nose pliers, with a dry hot soldering iron warm the stanchion and press them into the plastic.
this method should be described in the instructions??