I found what I believe to be the system on Amazon. Is this the product? Looks like it is getting amazing reviews.

1) One end goes onto an air-compressor, where does the other end connect to?
2) Also, I would still need a purge tank with this. It's not like this tool eliminates the need for that correct?
3) Last Q - the current set up has the overflow from the top of the radiator. I assume I would not run a really long hose to the rear engine compartment for a purge tank that I would want to establish this in the engine compartment correct?

Thanks and sorry for all the questions. I'm pretty good at turning a wrench but don't know how the cooling system needs to function properly.