[Beta Version]

I think this piece is designed to suspend the rails, not provide rigid support.

I highly doubt that lexan piece is for support. First, its too expensive, and second, this piece (owing to its short length and connection style) is apparently designed to slip in between two pre-existing railings, a very poor choice if your trying to make something stronger. Since it isnt for structural support, instead, it must be for suspension.

I think these lexan pieces, must be used as a way to suspend rails (curved or straight?) either above a surface, or away from a wall. the rectangular 'tounge' is bolted to the wall, floor, piece, etc. and the rails extend from it suspended.

And.. why isnt this is the rumour mill like it usually is? Its hard to find here