Hey guys - quick tip to cheat sanding the ceiling (cuz I hate that too). Instead of mudding & sanding the ceiling joints, when I did my HT we used 4 inch wide mdf boards and painted them to match the HT colour. Then we attached those over the drywall seams in the ceiling. The ceiling finishing was way faster with less mess and I really like the final look as it gives the ceiling some texture. I'm not home now but can take some pics and post this weekend if you're interested in how it looks.

Cheers,

Dan
On-Wall M5HP LCR, QS8 & EP500 in 7.1