Chris,

I read and reread my installation guide and couldn't find how to store changes. I finally went to the library on M's website and discovered there is also a users guide which I downloaded. Whole bunce of new info to work with!

I don't know what my aspect ratio is but does it matter without rear speakers?

Main: G68J, 5K2s, 5Ks, HSU subs, Pio 151FD, Dish VP722, Roku, Wadia I70, Anti Mode Dual Core, Oppo 103D Vanity Lite
Office: SBT, Berkeley Alpha DAC 2/MQA, Magico S3 Mk II, Boulder 2060, Lumin U1 Mini streamer, Roon.