im am pretty sure from what i read is you want trichomes that look like a golf ball on a tee and they should go from clear to amber ( ball clear, tee amber) and you want about on an average 50% of these colours. after you harvest the buds still ripen for a day or so . and like you said 10 days should be good, my buds are gunna be ready inabout that time frame aswell one plant a bit longer
peace