You're getting there. That's the beauty of the pitch and power curves, you the heli pilot can set them any where you desire. This is also how the "v" curve developed for the power curve.

For example (numbers are just examples), in idle up, if you want to fly inverted, you just build a pitch curve from ex: -10 to +10 with 0 at mid stick. Out at the ends (-10 & +10), your power curve points (pos-1 and pos-5) are going to ge high (ex: 90%) but at mid-stick (pos-3) you you have to set this to something low (ex: 25%) because you don't need all that power pushing on 0° or you'll over rev the engine/rotor.
So, in this example, pos-1 will be high (ex: 90%), pos-3 will be low/mid (ex:25%) then pos-5 will be high again (ex:90%). This draws a "v" on your curve.

So to fly inverted, just use pos-1 thru -3 and to fly right side up, use pos-3 thru -5.

The ability to design curves is what cause the extinction of the Invert switch and functions.

Just remember that you must get the power and pitch curve "in sync" so that you produce just the power needed at a particular pitch in order to keep the RPMs constant.

It's a balancing act really