1. No... Let's say you have an 8 ounce cup of water, a 20 ounce bottle, and another 8 ounce cup. You could fill the 8 ounce cup with water, all you'd have to do is pour water from your full cup into the empty cup. You could also put that water into the 20 ounce bottle, it just wouldnt fill it all teh way. You can still drink from the bottle, you'd just have less water in it.
So in other words, yes, they could fill a 4500PSI tank, but they wouldnt be able to fill it all the way. They would simply fill your 4500PSI tank to 3000PSI. They could fill it to 2000PSI if you asked them. But they cant fill it over 3000PSI because their equipment can't pump air at that high of a pressure.
2. Paintball guns don't work well in teh cold because CO2 is a liquid when its in the tank. Before it gets used, it expands into a gas. This rapid expansion uses up a LOT of energy. Since a lot of energy is being converted, the temperature of the CO2 rapidly drops. This makes all the precious seals inside your marker to shrink up a little and can cause leaks.
HPA, on the other hand, is always a gas. That's because its a stable mixture of many different gasses. Temperature changes really won't affect your marker, unless your playing on the surface of the sun with your HPA tank... It has a very high resistance to temperature change, where CO2 has a rather low one (considering it can't exist as a liquid at room temperature and normal atmospheric pressure)
3.
a. You can say it however you want... 70/30, 70/3000, 70ci/3k.
b. Higher internal volume means more air. More air means more shots. More pressure means more air in a smaller volume. For example, a 72/3000 is roughly equivalent to a 45/45. If you have more pressure, you can have a smaller tank and still have the same amount of shots.
c. The equation isn't really accurate. Every gun uses a different pressure (even two of the same guns could use different amounts of air depending on settings). There are MANY variables included, but those numbers will give you a very vague ballpark estimate.
4. Remotes are good for nothing. It doesnt affect your pressure or performance at all. REmotes will, however, do a great job at getting you tangled up, add confusion to your setup, and restrict your movement dramaticly. With a remote you are essentially tieing your gun to your back. HPA tanks aren't large, you're jsut used to playing with somethign small. The size of a 68/4500PSI tank is perfect for most people over 5'10". If you have longer arms, you might want a longer tank. The size of these tanks is perfect to use a a shoulder stock. Without a tank to press into your shoulder, you sacrifice a LOT of accuraccy. A longer gun means you can judge distances better. Trust me, a remote will only hinder your game.
5. No matter what we're all running around with high pressure tanks strapped to ourselves. These tanks are all tested very rigorously. A 4500PSI tank is actually tested to 7000PSI before its sold to you. SCUBA divers have been using similar tanks for over a half century with very minimal incidents. As long as you don't rush and have a qualified person fill your tanks, you will be alright.
As far as bad habits go, you dont have to worry about your o-rings as much. CO2 can freeze and subsequently crack your O-rings. Compressed air wont do that.
Also, I noticed you using the term HPA and N2. There IS a difference.
HPA is the air around us compressed under high pressure. When you hold your breath, your lungs are essentially a HPA tank.
N2 is Nitrogen, the element. The air we breathe is 78.6% nitrogen, so HPA and N2 can be exchanged without any worry on your marker. To the paintball player, they both do the same thing.
Your gun needs nothing special to use compressed air. It is a screw on modification to your marker, and is one of the best things you can buy. I highly reccomend saving up and buying a carbon fiber wrapped tank. Steel and aluminum tanks (almost all 3000PSI tanks are steel or aluminum unless otherwise stated) are heavy and hold less air. Almost all 4500PSI tanks are carbon fiber wrapped. They have an excellent weight to air capacity ratio.
$100 for a 48/3k is a ripoff. Be careful of your army surplus store. If they charge you mor ethen $10 for a fill, you're getting ripped off. Check out
www.pbreview.com for a field listing guide and look for a nearby field to get fills.
Let me know if you have more questions, I'm always happy to help
Noob to N2 - have some questions.
