I have found that marking knives while accurate are at times difficult to see. I have a drawer full of sharpened pencils with very fine points. I change pencils as needed to keep my lines as fine as possible. I have been testing a Bic mechanical pencil which uses leads that measure 0.7 mm and at this point I am still undecided on it.
I have been using the triangles shown in the following link for layouts and adjusting set ups and they work very well. See them here: http://www.rockler.com/product.cfm?p...1&site=ROCKLER
With most routing jobs I use brass set up bars.
For calibrating machines I use the Betterley Unigauge.
I'm with you on the mechanical pencils only they are Pentels in .05, .07, and .09mm complete w/ slip on triangle shaped silicone grips... Have a .03mm but that doesn't get used much.. the leads are too fragile for woodworking..
Drill sizing gauges to verify diameters... (wait till you try and figure out the true dia of an off shore bit)... different from bit to bit even with the same size declaration..
A wide array of drafting triangles, circle templates, protractors, (adjustable and not) curves, compasses, dividers, (IS/OS) Wixey..
Squares, saddle squares, machinist squares, speed squares, machined rulers from 6" to 72", centering rulers to 48", straight edges, trammels, folding rulers, calipers, marking gauges, brass gauges, cutting gauges, array of marking knives, set up dial indicators/bases, thickness gauges, fixed angle gauges and on and on....
What do want for four generations of tools/machinery...