per Derek:
The OH component naturally transforms into the XCarrick component
The alleged entity posited as an "XCarrick component" is a use of personal lexicon advanced only by Derek Smith.
To use the term
carrick in any sense is misplaced in my view.
In the first instance, the commonly shown tying steps for #1439 carrick bend (with uniform weave pattern) is in fact a
dressing state - which quickly undergoes a transformation when load is applied.
The original uniform weave pattern vanishes - and instead morphs into
two inter-linked #206 crossing hitches.
Climbers recognise and use #206 on a routine basis as a belay system - commonly known to them as a 'Munter hitch' / 'italian hitch').
The point being that the 'carrick bend' - supposedly where you draw the name of the alleged 'component' from - actually transforms under load to an energy stable state and does not resemble the original symmetry and uniform weave of its initial dressing state (which most people associate with).
And furthermore, it is actually possible to bypass the initial dressing state altogether - and simply tie a #206 crossing hitch and then inter-link another #206 crossing hitch with the first (to arrive at the energy stable final form #1439).
The term 'carrick' is less intuitive than 'crossing hitch' - with 'crossing' implying some form of overlap. In fact, a Munter hitch (which is #206) benefits from a capstan effect on the object to which it forms around (a carabiner) - and this,
together with a
crossing over its own SPart generate tremendous frictional braking power.
To describe Alan Lee's creations as somehow consisting of so called 'carrick components' (or X carrick components) is
arbitrary and non intuitive.