Wow classicman major work going on talaga
Im sure this would be one of the best ht set-up sa community natin
And since you want comments, i only have one suggestion sana kung pwede
Yung elevated flatform where you will place second row of seats SANA mas ok kung you'll make it up to the door na
para sa sound distribution and para maiwasan na may matisod kung medyo dark na yung room
I know this would cause some problem sa door size and opening but based from your picture you still have some place to adjust the door position upwards
or if you dont want to re-fit the door maybe you can just re configure it to open outward and then make the flatform tapered leading to the door to look like a ramp para iwas tisod pa rin
just a suggestion lang po sir