Modular Ability Questions

First question: If you have a modular ability that you "lose" after using it, is that "One use" (1/5) or Limited Use (1) for -40%? And for the later, does the "recharge time" matter?

As I understand limited use, it impacts the modular ability itself. That is, if you memorize a GURPS spell and then always forget it after casting it, then the modular ability advantage itself has limited use, correct? But how does this interact with abilities that are themselves single-shot? For example, if you have a catalog of abilities (say, 10) that you can choose to slot into your modular ability slots, like having a set of 10 chip slots, and nine of them you can just use over and over again ("I slot brawl. I punch someone. I punch someone. I punch someone.") but one of them, if you use it, it's gone until you get another chip to slot in ("I slot emp burst. I use emp burst. emp burst is gone."). Is that ability "limited use (1)" or "single use?"

Also, on page 63 of Powers, it states:

Quote:

The GM may invent other forms. Set the per-slot cost to reflect the scope of available traits: 4 points for a short list, 5 points for a lengthy catalog, 6 points for nearly anything, and 7 points for anything.

If this is so, what's the point of the Limited modifier (such as "spells only?") I had the impression that super-memorization, for example, was about memorizing any skill but if you limited it to just spells, it would be -20% (paired with instantly forgetting gives you a total of -60%, or 14 points for a single, 10-point slot). But if the per-slot cost reflects a limited list, and if you said "this only applies to these 10 specific spells," then wouldn't you just charge 4 points per slot? That would mean that the per-point cost wouldn't drop. And this per-slot cost doesn't seem reflected in Computer Brain or Cosmic, which doesn't seem to follow these rules at all.

So if I were to create a D&D-ish style "Fire and forget" set of abilities, how does it get priced?

Modular Ability Questions