So on page 196 of the Core F&D book it says "When a character modifies attachments on his own Lightsaber, he decreases the dificulty of the Mechanics check by two, to minimum of Simple (-)".
Does this mean that you essentially get 2 'free' (assuming you don't blank) rolls to modify a Lightsaber and/or its crystal? As in you only add a purple dice once you get to 3 difficulty since its reduced twice?