I've done most of the things correctly, and the outcome looks very nice at first glance, but with a closer look, I realised that the depth of the active recording contacts is marked far from how it should be.

Basically, the probes tend to be too short or shrunk a lot.
I provide the actual depth readings in mm from the recording sessions for probe_lengths, but the probes are ~20% shrunk in figures.

By placing markers for the tip and the entry point of the penetration track, one should be able to measure the distance in the standard atlas without relying on user input as probe_lengths, so I don't understand why we need this.

But even with the real depth readings, the probes shrink a lot and the highest part of the active contracts are much lower than where they should be.