Modify Tracks to Remove Risers and Prevent Sag

Not being from Australia I couldn't exactly help but have you contacted any Hobby Shops near you? If they don't carry exactly what you need they may know a manufacturer in Australia that makes them. My Hobby Shops only carry the 12" long in stock which is only good for shorter sections of track. I called the manufacturer to order longer lengths.

It seems the manufacturers in Australia don't do thinner than 10mm so I grabbed some 3mm x 10mm aluminium and filed about 1mm off the width each end (for the riser grooves) and it works well. Was able to get 3m lengths of it from Bunnings. Thanks Super for the original idea.