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<p>I'm 68 years old and live in a senior's mobile home park in Lafayette, CO.  We had two huge cottonwood trees on our lot that were partially dead taken down acouple of years ago.  Instead of having the stumps ground down to ground level, I elected to build a four tier high Pavestone wall in an oval (approx. 25' x 10') around the two tree stumps which were about 15' apart.  When the wall was completed, we filled the inside with dirt to create a nice size raised bed.  Now I want to install G scale track on top of the wall.  Has anyone else done this?  How did you attach the track to the top of the wall?  I've heard of a product called TechniSeal Polymeric Jointing Sand that can be used as ballast then when wetted down it "sets up" to hold the track in place.  Does anyone have experience with this?  If I go this route I'm concerned with the ballast not allowing the track to expand and contract.  Any hints, suggestions or help greatly appreciated.  </p><p> Willijrw</p>
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