Hi, I received a PM about using the system above, for anyone else interested see the extra little detail below
Something i didn't mention was that the Crit modifier is adjusted for the class of Crit.
Currently I am using T=-10, A=+0, B=+10, C=+20, D=+30, E=+40, these are added to the crit roll instead of the listed values in the HB 11 attack charts.
You could adjust these values change the how lethal the game is.
The Hit location chart as below used inverted 1D100, eg swap the tens and the ones, it distributes the hit locations all over the body. I allow a penalty to "aim up" to hit a specific location. In true HARP style ill include an example,
1 Head
5 R Foot
10 L Foot
15 R Leg
20 L Leg
30 Groin
40 Abdomen
50 Torso
55 R Hand
60 L Hand
65 R Arm
70 L Arm
75 R Shoulder
80 L Shoulder
90 Neck
96 Head
Say the unmodified attack roll is 64, when looking at the location chart, read it as 46, which will be Abdomen strike, lets say the defender is wearing a chain shirt, If the attacker stated they wanted to aim for the right arm, as it is unarmored, they apply a penalty of 20 to the OB (i step in lots of -5) to make the 46 a 66, which brings it into the threshold for the Right Arm, but changes the attack table from Chain to None.
Ill also post this in the general forum for interest.
Regards