The parasols are back from printing. They are to scale. In order to comply with the supplier's minimum printing constraints, it is necessary to prepare an object grouping several targets.

The lightweight straight mast is also back from print. Once mounted with its PCB, the rendering is impressive at the trackside.

All the PCBs have now been corrected, and the first version of the crossing light is also functional.

The N scale (1/160) is now respected with this new version. The choice of 3D printing method has also been validated: matte black SLA resin.

Two errors occurred when sending the files for the PCBs:

• the latest version of the H-type target file was not sent (connections under the mast on the wrong side);
• the file for the direction lights was incorrectly parameterized when the order was placed (thickness 1.6 instead of 0.8 mm).

The rendering of the first models is superb! They've all been validated. No adjustments are required to fit the PCBs into the 3D-printed masts.

However, the direction signals need to be displayed above the target. This requires several changes:

• create PCBs representing the different shapes of direction signs;
• create new versions of the masts to allow two PCBs to be inserted;
• change the positioning of the BAL target connection pads so that they are accessible for soldering when two PCBs are inserted in the mast.

The size of the targets is too exaggerated and needs to be slightly reduced to get closer to the actual dimensions.

Design of the first test light targets.

The printed circuit fulfils its function and confirms the choice of this technique, which simplifies wire management.

Several modifications need to be made to this first version:

• modify the PCB shape to match the mast cut-out;
• show the signage identification panel;
• add eyecup connections;
• create the most complex models immediately to validate the passage of all connections in the mast base.