SR 5th ed. Customized STR/AGI on Cyberskulls and torsos

[seelenamt]

So this will probably be a matter of debate, because it can be argued either way.

The SR5 Core rule book (page 456) states that

Cyberskulls and –torsos are included in the “cyberlimbs” category, though they are in fact shells rather than full replacements (or actual limbs).

As it stands right now, you can customize your strength and agility for both the torso and skull (and even partial skull). The statement that they are shells would seem to imply the underlying bone and musculature would be untouched, which would mean they would not have customized agility and strength.

Right now, Hero Lab doesn't allow you to add enhanced strength or agility to either of these parts, but as far as I can tell there's nothing to back that up except the implication that they cannot be customized as normal limbs, which would support the idea that they can't have customized agility/strength.

I unfortunately can't find any official clarification either way, but I'd like to hear what other people have to say.