what would the community suggest as an aid for correcting wb? im currently using the gray page from kelby's LR3 book, which i fold and tuck into my bag, and whip out before i shoot. its a bit flimsy, and i get plenty of confused looks when i take it out and ask someone to hold it so i can set custom WB
i was looking at the expodisc, and some of the other gray card aids. with a card though, i feel like its the same issue as with my current sheet - having to fold it and tuck it into my bag. the idea of an on-lens aid sounds appealing, but they are pricey.
what would you recommend?