Bringing this thread back to life to ask a specific question about this point from the original post. Per the above, it seems logical to really focus on getting GAMIs dialed in for a particular setting. I like to fly my new Bravo at 29"/2400 as well, but that's 75% power - per Savvy and GAMI, the GAMI spread test should be done at 65% power or lower. Is it okay to do the GAMI spread at 29"/2400 as you're just transiting the red box, or should it be avoided?
I'm struggling to see how you can solve for both constraints here - staying below 65% but also optimizing for a standard cruise "sweet-spot"
Also - what's the best altitude to do the spread test at? Savvy suggest an ambient pressure closest to your MP setting, but that seems very low. For example, if doing the test at 65% - 26"/2400RPM, that would be ~4000ft AGL (i.e. ~29.92 less 1" per 1000ft of elevation = 4000ft for 4")?
Thanks!