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Yes gentlemen I have been working on two project together for months and have had nothing but delays a lot is to do with waiting for availability of funds and for us to take a trip down to Sydney to get 3.6 m rail lengths.But i have just now sourced my detection module for the other project and the brick idea looks like being just right, 76 mm high which is one dimension of the brick and it will just suit my lowest height and two bricks will just suit my highest height and the width of 110 mm will just be right for accomodating a single track. i have even sourced brick seconds for A$0.30 e  As well i have resumed an earlier article on this forum, to do with "Gulapata" with view to coatimg the bricks, to get a realistic idea of a way through a rocky environment.If anyone is interested i have done a guesstimation type calculation, for this goo and have sourced all the materials here in Queensland.1 part portland cement, 2 parts fire clay, 2 parts hydrated lime, 45 parts ready mix mortar and about 17 parts water, depending on conditions.Anyone interested in this i am sure Rene can direct you to the article, she did me about a year ago,Rgds ian
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