Didn't you just do a really expensive course that teaches you all this stuff??
I reckon that the life-systems ones are a bit gimicky and are a bit short on the things that you really need.,
If you ever end-up needing burn-gel for kayaking then it's probably because you were drunk and did something stupid - in which case you don't deserve a first-ad kit.
You're only really looking to cater for real emergencies:
Fanny-pads and duct tape will get you through most anything but
I'd also include a mini barrier device, proper shears, some rubber gloves, cling-film and maybe a bivvy-bag.
...just don't forget the safe-word.
My instructing kit would have a few more things.