hello WB,
didn't see your first post , sorry... Anyway , I wouldn't chit them yet . Keep them stored in a dark, frost free but cool shed/room . You can store them either in paper or hessian sacks , or you could store them in cardboard boxes. Just keep checking them for any rot . Next year you can start to chit them when the time is right , ie for the particular variety you have. If any sprout before hand just rub off the spidery sprouts. If you intend to grow in a poly tunnel you can start them earlier . The main thing is to keep them away from heat and light till you are ready to chit them. I don't really bother chitting mine these days , as I don't seem to see any difference in quantity of yield , or quality of potato. This is a matter of chioce really , but good luck with either way ....
cheers
Russ