(...) That looks very good. Just a small note - the MPD file should have the s/ on the 0 FILE line for the subfile, viz 0 FILE s/32078a.dat 0 ~Tyre 28 x 70 subpart 0 Name: s/32078a.dat That way the file will open in L3Lab (and other DAT/MPD (...) (23 years ago, 6-Oct-01, to lugnet.cad.dat.parts)