I don't drybrush very much, I guess you'd say I "Wet Brush" because the details are just painted. Look on my models page (the link is in my signature below) at the F4U-1D and F-105G I'm working on now. They are both 1/32 scale but there is a ton of detail in the cockpits.
The key, at least for me, is the style of the brush. Not so much the size, but the style. I use # 20/0 brushes that come to a very fine point and then thin my paint a lot.
Also, as was mentioned above, a magnifier and good lighting are critical. At 52 my eyes ain't what they used to be, and I can't paint it if I can't see it. My lamp isn't the greatest, but it is a 4" magnifying lens with a 60 watt lamp in it. I think it cost about $20 at Staples or Office Max or something like that. I also have two 4' flourescent fixtures over my bench.