I think you should make the ribs raised for that little touch of detail... as for the resistors, cool, I got tons of little parts like that, I got a broken memorycard adaptor, the chip from a blood glucometer, abroken chinese ipod etc.
Gotta love 'found' parts, heck I even used a retaining clip from a kids toy (retainer to hold toy into box) on my left cheekbone, look close at my avatar.
Good work keep goin