@Kim How did you manage to see the photos again?
In the last few days the locomotive shelter went a little further.
Dreh-Schiebebuehne_49 (fspg2)
Dreh-Schiebebuehne_50 (fspg2)
Dreh-Schiebebuehne_51 (fspg2)

The inner and outer parts of the wall were milled out of HDF.
Dreh-Schiebebuehne_48 (fspg2)

After the 0.5mm cutter had milled the 0.5mm deep grooves, I sanded the upstanding wood fibers with a sandpaper file and swept the grooves free with an old toothbrush.
Dreh-Schiebebuehne_47 (fspg2)

Because of the HDF board is 5.2mm thick, I had to reduce the material thickness a little for the interlocking. This was done on the Proxxon circular saw.
Dreh-Schiebebuehne_52 (fspg2)

Now the remaining "teeth" have the same material thickness as the 1/2 stones and match the rest of the milling pattern.
Dreh-Schiebebuehne_56 (fspg2)

I still have to expose the horizontal grooves, as shown here:
klickDreh-Schiebebuehne_53 (fspg2)
