As Roy Link's standard was based on narrowed EM gauge I bought Carrs (C&L) EM roller gauges. These are very similar to John's description except that the spacing is done by a piece of tubing on the bolt. Simply shorten the tube.
From: O14@... [mailto:O14@...] Sent: 30 January 2015 11:14 To: O14@... Subject: [O14] Re: kargarin 100/8 rail (roller gauges)
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Hi Kevin,
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A simple, crude but often effective method is to use a long bolt, 4 nuts, 4 large washers and smaller washers to pack out to the rail width. If you do one end up tight then adjust the other using a piece of track to a known exact gauge as a reference.
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I made a few like this for my S7 with gauge widening for the curves.