Up until this year I've never bothered to chit potatoes, I've just bunged them in the ground and they've always done fine.
This winter though I've read so many articles in gardening magazines on how essential it is the chit the seed potatoes that I'm trying it out. So far it looks as if the sprouts are growing nicely but I assume that they'd have done that in the soil anyway so . . . . . .
Anyway, I'll be planting them out in the the middle of April, as usual, and waiting to see if the chitting actually has any effect. I'm using Cara again this year because I've always had good yields from them in the past so it'll be interesting to see what happens.
So, I suppose, the answer to your question is chit or not, it's entirely up to you.