... Barrowman...and here's the jaws profile I'm using for SMP rail. The slicer will chamfer the lower edge of the inside jaw somewhat. The gap for the web is drawn oversize but it works for SMP rail. The gap under the inside jaw is to make it slightly compliant so that the rail is always forced against the outer jaw. All highly empirical of course but it seems to work reasonably well. A lot of other methods I tried (there were many!) would not hold the rail vertical. 2983_121547_120000000.jpg posted: 13 May 2020 06:15 from: Andrew Barrowman Attached is the .stl for a short panel of track with 3-bolt chairs that might work for C&L rail, but I won't be surprised if it needs adjustment. The panel is offset two degrees from normal to test the resolution of your printer Attachment: attach_3042_2734_CLchairTEST1sW.st l 79 posted: 13 May 2020 08:31 from: Charles Orr Thanks Andy, I'll do a test print in a bit and let you kow how it turns out on the ...