a delivery system where you don't have to drill a hole thru a screw is nice.
I understand -- I don't have a drill press (or lathe) either.
But you can buy pre-drilled "vented" screws from a number of places including McMaster and Amazon; they cost $2-3 each, no biggie in the grand scheme of things. The only issue is that the holes through 'em are a bit smaller than optimal and the hole size gets smaller with a smaller screw -- the holes are spec'd around or under 1mm, when what we'd really like to have is 1/16" (about 1.6mm). It looks like one could use certain M3 screws without having to modify their heads, but they have the smallest holes. 6-32 screws (being about 3.5mm) have slightly bigger holes, but all the 6-32s I've gotten so far require some modification of the heads to provide adequate clearance in the 510. M4 screws would require even more modification, hence I think 6-32 might be the sweet spot. Modifying the heads is a bit tedious if you using nothing but a drill and sandpaper, but its not difficult and doesn't require any skill. I also have some more vented 6-32s that might not need any modification (or at least would be less tedious) on the way.
There's also someone looking at drilling out some M3 screws for us with a 1/16" bit. These wouldn't require any modification to the heads, and if this pans out, they should be available in sufficient quantities for individuals wanting to build these mods.
Anyway, no angst.
