What is the best way to mount the response seams? How many pins should I use? Should the top and bottom be as flush as possible with ceiling/wall or should there be some space? Flush looks better.
4, one on each corner
5, one on each corner, one extra in ceiling in the middle OR one extra in the wall in the middle
6, one on each corner, one extra in ceiling and wall in the middle
Suggestions, please

jan