Please explain.

I have never used a pitch gauge while setting my pitch curves and I always end up with a neutral setup with equal pitch on either side of 0 pitch (which occurs for me at mid stick). The only thing you really need the gauge for is establishing 0 pitch at midstick (or some other point if you choose) and then to verify max positive/negative pitch. Good for checking your cyclic pitch as well but again, you can do that without the gauge and end up close to max pitch by backing the servos off from binding.

as far as adjusting pitch curves goes, starting purely linear and having all three modes use the same mid point are what I aim for. All the rest of the adjustments I make I do by feel seen as I already set pitch using the travel adjust to keep binding out of the equation. If you want less negative pitch or positive try using 20 or 80 as your first and last points on the curve and see how it feels.

Point is, you are going to have to test fly any change you make to the pitch curve to see how it affected the heli and if the results are what you were after anyhow. A pitch gauge is imperative to a proper setup but I find it more useful in the initial setup/rebuild phases for verifying the numbers as opposed to throwing it on the heli to actually adjust pitch curves for feel in flight.