Exactly how would a PD-XP work?
The mechanical 2-level nature of the PD/Kilroy isn't compatible with the 3-level converter, so they can't just be combined. If a 2-level PD mechanism with an XP LED is wanted, there are modders around that can probably do that with PD, though the beam might not be as nice. If a 3-level PD mechanism is wanted using the 3-level converter, well, Kilroy isn't there with that converter, so the piston isn't needed. Which means either the piston would need to be replaced by a switch (that's a Haiku) or re-designed to simply be an overly long momentary switch, which sounds very Un-McGizmo-like to me, especially if it's just to have H3. Don's already dismissed a 3-level PD-like mechanism due to the complexities that would be involved, so that's out.
Maybe I'm missing something, though...:thinking: