Here is my shit upscale of B/X / downscale of Worlds without numbers. Always really apreciated how the BECMI character sheet was formated. simple, clean and readable. very much unlike the clutter of Worlds without number. THis is essentiallythe BECMI character sheet but with the addition of "RS", which stands for reserves, which is essentially WWN's strain. Its your dedicated bean counter you can use to slightly nudge a roll one way or another. But it also acts as your negative HP, so if you use it, you sap away your survivability.
I feel that makes it feel a little more concrete then a totally abstracted metacurrency. Its your reserves, physical, emotional, etc so you weaken as you use it.