I have no idea how people get a good test with a bike pump, unless they don't have a massive FMIC with large IC piping to fill and there are no leaks to find
It's also important that the pump/tank/whatever be silent so you can hear leaks. You don't need a regulator if you "regulate" it yourself. It takes time to move air through a shraeder valve, so just watch the guage and let off at the appropriate time. If you use a quick disconnect like I mentioned for high flow rates, then you would need a regulator.