I have a specialized class I am creating that has a class special they gain at 3rd level that causes them to grow a set of tentacles that gives them an extra slam attack. For the class special I've bootstrapped wSlam with a tag of wMain(1d4_4). This seems to add the attack to the weapons for the character when they gain the class special upon reaching 3rd level. The issue I'm having is that the slam attack they have should take a -2 penalty, and the damage should be 1d4 + 1/2 the characters strength modifier. The 1d4_4 I've applied with the wMain tag gives me the 1d4 base damage, but I'm unclear on how to get 1/2 the strength modifier, and how to get the -2 penalty to hit. I tried using the wAttBonus with a -2 value, but that doesn't seem to work with a natural weapon and makes the class special get an error about it not being unique when I compile it. Any help would be greatly appreciated. Thanks.