Yeah usually when one of the survival kit threads pops up a lot of good ideas come from them!
I'm not sure which thread is which anymore, but if you want ideas, here's a few of mine. I would add in some bug juice in a small bottle, some cordage, one of those small Swiss-Tech folding pliers, a tube of Chapstick, coffee filter, and a couple bouillon cubes.
I would drop the tweezers, pencil, P-51, sewing kit, extra battery, prybar, and water treatment tablets. I would also replace the standard Bic with the smaller one. Then make the fishing kit much smaller.
You have that SAK and it has tweezers and a can opener.
Throw a sewing needle in your fishing kit and call it good for sewing. Just make sure your fishing line actually fits through the eye of the needle. I learned that the hard way and felt like an idiot when I needed it.
Most flashlight batteries last 20 hours, and you will not be using it all night every night. Using it every now and again during darkness, and it should last a few days anyway and if it doesn't, get one that does. Replace the battery every year and call it good.
The pencil to me just doesn't justify a place in a small kit. I will leave it out and make more room for something useful so I don't have to write my will while sitting there. I'm not taking notes as to where food is for future reference. I'm going to stay there and eat it all and when it's gone, I will move knowing there's nothing left for me there to take notes on. Besides, let's be realistic here, do you really think you will find so much food you need to take notes to where it all is? It's not WalMart out there with rows of food, but if you want to spend time writing, keep it as this is just my opinion.
The prybar I'm not sure what you would use it for out in the bush. I think the Swiss Tech tool would be much handier to have around. I mean when was the last time you seen a farmer or anyone with a leather pouch on their belt holding a prybar compared to a pair of pliers or multi tool? Out in the bush or anywhere for that matter, a pair of pliers would be used more as it has a wire cutter, that really works, a blade and phillips head screwdrivers, and if need be, can be opened up and used as a make shift prybar to some degree. I just think in a survival situation and a small kit, pliers would be use a lot while scrounging around finding bits of steel or whatever and bending it into something useful. Again, this is my opinion and if a prybar works for you, pack it.
The water treatment tablets are an item that needs to be checked and rotated. They will only treat a small amount of water anyway. You have a tin that can boil around 9 ounces of water and boiling is the best way to treat water anyway. Dump the boiled water into your water bag and your done. The survival straw can be used to drink the boiled water to make it taste better if need be. Use the coffee filter to extend the life of the straw if the water is really bad.
The bouillon cubes can be used to make a tin of soup for something warm to drink and will give you the needed salt after a few days.
The fishing kit is to big in my opinion for a kit this size. Take a small sewing bobbin and fill it with braided line that fits your sewing needle. Tie a hook on it now, and tape it up. Inside the hole in the middle, put in three split shot sinkers and tape an extra hook or two on the sides and call it good. You have 40 to 50 feet of line with three hooks and three split shot in a small package. A fly is a good idea if you have frogs around as they will grab those things left and right and make an easy meal for you. I don't gig frogs, I use flies and dangle them around the frogs. Again it works for me and if gigging works for you do it. I think three salmon eggs are a good idea as you have bait right there and you are not expending energy looking for it. I would vacuum seal them in a Food Saver bag though.
Also, since you don't have any plastic or space blanket, I would at least have some cordage to help tie together a shelter. I use Berkley Gorilla Tough braided fishing line in 80 lbs test. It's ever so slightly larger than one strand of the guts of 550 cord. I put about 30 to 35 feet on an industrial sewing machine bobbin that's about 1.1'' across and less than a .5'' wide.
Put bug juice in your kit. The first night you will not have shelter because you will walk half the night thinking you will get out and when you finally do sit down and accept the fact you're spending the rest of the night out there without shelter, bug juice will make it easier when sitting out exposed. The next night you better be building a shelter if you're still out there. Get a few of those small brown glass bottles with the teflon seal from ebay or wherever or even use an old bottle that held water treatment tablets and fill it with bug juice and seal it up again with wax. They work great and you are recycling.
Chapstick with the highest SPF rating you can get, would be something else I would have. Put it on your face and anything else exposed so you don't get sun burned.
The smaller Bic will be starting fires long after you are dead or rescued so there's no need for the bigger one.
These are just my opinions and ideas from past experience from myself and others.
