... stability. Best wishes, Howard Last edited on 6 Feb 2018 09:52 by JFS posted: 7 Feb 2018 05:03 from: Andrew Barrowman JFS wrote: Hello Andrew, Looks nice! I wonder if you could put a vernier over the guage faces in three or four places and let us know how close the gauge came out to the target dimension please? Also, perhaps repeat the measurements over the next few weeks to give us a guide to stability. Best wishes, Howard Hi Howard, Here you go 2983_062335_260000000.jpg The rails were a bit wobbly on the previous sample. I've adjusted the chairs to grip the rail properly on this (unpainted) version. The nominal gauge is 16.2 mm. Due to the small amount of compliance in the plastic it's not so simple to measure the gauge precisely. I've used go/no-go tests with a vernier gauge checked against a micrometer. When I insert the vernier between the rail heads and there is enough interference to lift the sample it's considered a "no-go". From ...