well still cutting out track, but I did make up the tread and two connectors from some photocopies hence the washed out colours. When together better than I thought especially the connectors.part 262c especially but curling each end and then glueing it on to part 262a whilst still in the jig and then pushing in part 262de straight after pulled in the curled ends of part262c. Below are the trial bits of track.
do you think I should but a little hex nut head in the centre of part 262c where the printed circle is.