Great job Sarge those buds look beautiful. I'm drying myself and as SUB mentioned the rule of thumb is 7-7-7, however if you look it up on growweedeasy.com they say 50-60% I have usually done the 777 but I ave had to take the buds out and dry them so now i dry 1-3 days 60% 3-5 55% 5-7 50% by day 7 the limbs have that beautiful snap to them. I have never used cardboard but i read a lot about them they make great makeshift dry rooms. Enjoy looking forward to smoke report