Yes. All tanks and remotes have a standard ASA thread.
You theoretically could, but it would probably be unsafe, Remote coils are relatively inexpensive, and you will have to spend money for a harness anyways. It is not worth the risk to your back and face to try to make your own.
Yes, all brand paintball guns use a tank or other source of pressure.
Cheap co2 tanks are about $20. Carbon air tanks go all the way up to $125 or so
The sizes 9 oz and all the way up to 20 oz can be used for paintball gun. Some of the paintball guns are supposed to be used by the larger tanks. So the size of tank depends on your paintball gun.
Paintball guns can use Co2 from any company, they are all built the same. You can find valved tanks and 12 gram's at sporting stores, paintball fields and proshops.
size is all personal preference, you can get something as small as a 9oz or up to a 24oz co2 tank, the larger the tank is the more shots you will get off of it but the heavier and larger it will be
the only parts you can not ship are the pressurized tanks. You can ship tanks just fine, just drain them before shipping. Otherwise put it all in a box and ship it off.
All paintball guns require propellant, but some use HPA or high pressure air, instead. HPA tanks are more expensive and holds less shots, but are significantly more consistent (accurate) and easier and cheaper to refill. You can also tell how much you have left on a HPA tank.
No. the only full air canisters are 12 gram CO2 cartridges, all others are sold empty under law.
There are many places where someone could purchase a remote control tank. Stores such as, Target, Walmart, Toys R Us, and hobby stores would all sell remote control tanks.
There are no cheats for paradise paintball.
Not at all compared to actual paintball guns.