A syn allowances-worth of chocolate would just make me think about the rest of it still being there.
After Easter I could probably go until Christmas without touching chocolate again as it’s not something I crave per se. I can’t remember the last time I ate chocolate. It’s not generally my weakness, although I do like some specific types of chocolate (Galaxy is my favourite) So although it’s not within the spirit of SW, I’m just going to eat the lot in one go and enjoy it as it’s a one off/one day thing.
Christmas is a bit different as there is chocolate everywhere for weeks and it’s easy to eat a bit here and there without realising it and it being on everyone’s coffee table/in the office etc makes it a temptation.
On a normal day it’s thick slabs of fresh bread with proper butter that are my achellies heel! 
I should have waited till after Easter really to start so that I could do it ‘properly’ but I didn’t want to lose the whole week IYSWIM.