Wow! What an incredible piece of work! In looking at the pictures, I had one thought. As the TM goes in and out of the holes, you don't want the sidewalls of the tires to scrape on the rough edges of the cut concrete. WMTIRE may chime in, but I think it could damage the tires. Laying a sheet of heavy vinyl or draftsman's mylar sheet over the edges of the holes might provide enough protection.
Bill
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