I haven't been able to come up with a working macro for grinding droids or droid chassis, but the best way that I've found to cut the time required to make a droid is to pre-build cases of commonly used droid components in a factory. Things like factory cases of Adv. Droid Frames, Manipulator Arm/Sets and the high holy Adv. Droid Brains. You will need factory cases of some of these components anyways to craft advanced droids like the R3 and Binary Lifters that require multiple components from a factory case. In any case, using factory cases has cut my crafting times for an advanced droid from 30+ minutes to under 10 minutes. (for the non-DE's, that is in real-life time. So don't ask for a break on a price!) If you are trying for DE, the easiest way to grind xp is to make Adv. Droid Frames. A macro can be found for these, they only take steel and fibreplast and net @400 xp ea. (I cant remember exactly how much). If you are going for DE because of the Holo chase, give up and read the forums on the new paths to Jedi. If you can't stand crafting, perhaps DE isn't for you...