I've been fiddling with a version where you start at +0 damage and RT 4, and each +1 ST is worth +1/3 to each (round to nearest). Instead of rolling damage and converting to wound potential, you just use the damage as wound potential directly. Roll a d6 and give -1 on a 1-2, +1 on a 5-6. Swing is worth +1 damage.
That's the bulk of it, but there's more detail (including how armor works) in
this thread.