Jsk Feats:Modified Weapon Master

You have mastered the art of modifying weapons to expand their utility: You can adjust any number of weapons as long as you are proficient with them. A modified weapon sells for one quarter of the original weapon's price, instead of half. If you adjust a heavy weapon to have the light property, it loses the heavy property instead of gaining the light property. If you adjust a weapon to have the thrown property, the range is 20/60. Adding the reach property to a ranged weapon increases its normal range by 20 feet, and its long range by 60 feet.
 * Increase your Strength, Dexterity, or Constitution by 1, to a maximum of 20.
 * You gain proficiency with modified weapons and the tinker's tools.
 * With this feat, you can choose a weapon that you are proficient with and modify it. Using tinker's tools, you can spend 2 hours adjusting the build and components of the chosen weapon: the weapon gains one of the following weapon properties: finesse, light, reach, thrown. When modified in this way, the weapon becomes a modified weapon, and only those who are proficient with modified weapons can use them.