Guide for steering wires for a steering mechanism for a steerable tool

The invention relates to a longitudinal member, LM, guide (300) for guiding a set of LMs (110) for a mechanical transmission system, MTS, (100) for a steerable tool (500), which LM guide (300) comprises a body (302) having a proximal side (342), a distal side (344) and an outside edge (316), wherein the body (302) of the LM guide (300) comprises a set of channels (310) arranged around a fictive tube (320), each channel (310) passing from the proximal side (342) to the distal side (344) of the body (302), configured to retain an LM (110) of the set in a fixed radial position around the fictive tube (32), being connected to the outside edge (316) of the body (302) via a slot (314), wherein the slot has a width (326) narrower than the channel (310) width (320)