i use a small ports organizer
https://www.menards.com/main/tools-hardware/tool-storage/storage-racks-containers/plano-reg-24-compartment-small-parts-organizer/532430/p-1444450814379-c-9189.htm?tid=3271164328182768307&ipos=59
Do NOT get an axle for splitting firewood. Get a splitting Maul. I have used this Fiskers for years and love it. https://www.amazon.com/dp/B014M9LQGG/?tag=atomicindus08-20
This is what I am using. It is a 20 .lb liquid CO2 tank. I can shoot thousands of nails before needing to have the cylinder filled again. Best part is that it is silent (no compressor running inside a house)