In case you've run low on Shinteki graph paper, Eric Harshbarger will sell you pencils adorned with code alphabets. Hmm, they're #2 pencils. For collaborative outdoor nighttime solving, that's probably better than a too-skinny mechanical pencil, but not as legible as a darker lead. I might leap to the conclusion that Mr Harshbarger mostly plays indoor events. (Goodness knows, the indoor events he runs sound pretty darned amazing.)