I know this has been covered before but what the heck.

If your bikes have dropout adjustment screws, how do you set them? And why?

I've heard about wanting to get the guide pulley position right w.r.t. the FW. I did that subtle tweaking on one bike though the real reason was to tweak the effective chain length. Otherwise I generally set the screws in moving the axle forward. Since the bikes feel different and have different geometries I'm not sure there is much correlation between them all.

So what do all you world-class experts do? Edjukate me on your motivashinul reasons.