Second-edition Dark Heresy.
From craftsmanship:
Good: An eye towards balance and design means this weapon grants a +5 bonus to all Weapon Skill tests made with it.
From the cybernetics section:
All mechadendrite cybernetics are considered to be of Good craftsmanship unless otherwise noted.
Does the bonus to melee weapons of Good craftmanship apply to Mechandrites that have an included melee weapon (or weapon functionality)?