Mike etc,
Whatever you decide to carry in your personal kit, be very sure that you keep it up to date with SOPs and Jepp amendments.
Cheat sheets, which I use too, have the propensity to get horribly out of date amazingly quickly.
Be very sure that this info isn't in a book located beside you in the aircraft.
As you copy stuff into your personal files, always copy the page ref too. This makes it easy to keep up to date and also to defend your opinions on things listed.