Sorry, my bad for not explaining further. When I said I was set up as 7.1.4, I meant that's how the speakers are laid out. I've already done as you suggested. Great minds think alike, I guess. My Speaker/amp assign is:
Assign Mode - 9.1
Height Speakers - using Dolby speakers
Height Layout - Front and surround Dolby
Pre-out - Surround Dolby
I know they all won't work at the same time. According to the manual it decides based on what speakers you've told it you have. It seems to do that. DTX plays as one dimensional 7.1. Any Dolby plays as two dimensional 5.1.4, which in cases where it's not Atmos, hearing surround sound from the 410s is a little odd. IMO, the 410s should only play when there's Atmos encoding, not just any Dolby.
Oh ya, full time 7.1.4 would be schweet! I bought the 4100 right after Christmas because it was on sale. As with every other toy I've bought, after learning just a bit, I realize I didn't buy enough. I bought the 302, and now wish I would have forked out for the 347 stroker
Thanks for the volume tip and details on the angles. I'll keep plugging away. Right now it's time to tear it all apart and start the cosmetic & acoustic work on the room. My set up has only been a trial run to make sure everything works. I'll be back in a couple weeks when I've made more progress. Thanks again for all your info. You've been a huge help.