Your are changing the shape without documenting this fact. And the
problem is not 0.1 staff space but loosing the vertical symmetry
for no good reasons.
My point is that there is no vertical symmetry in hand-drawn 15C
clefs, so there is no point it trying to recreate it in 21C machine
drawn clefs.
While I don't agree with this reasoning, this is not what I'm talking
about.
Whoever created the original clef made it arbitrarily symmetrical,
with no justification, so changing this needs no other
justification.
Again, you are missing my point. It's not about justification, but
about *documentation*. The description of your patch *must*
*document* what you are doing, especially if you are changing the
shape. Looking at your code changes, this can't be deduced easily.
Regarding the shape: What are the reasons for changing it? Do you
think that an asymmetrical clef looks better, coming nearer to
hand-written originals? Then document it. Or is it an artifact of
your first MF tries? Then fix it :-)