After your first set, the tools you purchase in the store is just for skins anyways or the glyph inside. When they converted the tools to have glyph slots, they didn't compensate anyone who bought tools with no effect as a bonus glyph. Arenanet should have put glyphs in them all, but they didn't. They still won't put glyphs in the older tools even though they are priced the same as newer ones. Things are just so all over the place.