mine is 60x mate. and to be honest that's prob the lowest you can get away with.
And I found it's better to hang the buds mate. that way air can circulate all around them. When I tried box dryin, the sides that were touching the bottom stayed very wet all the time. when u turned em, the opposite side got wet. kept on happening rather than evaporating away.
and with curing, as you know i'm no expert, but i've read a fair bit about it. They say it's really important as in effect it kinda "ripens" your bud. A bit like pickin a banana and leaving it on your windowsill and it goes black and really sugary inside. Well apparently some chemical shit happens in the bud too improving flavour and stuff like that. They say u need to burp it (take it out of jar, spread it out somewhere for an hour on newspaper or summat, then put back in jar) every 12 hours for first 3-5 days, then maybe once a day for the next few, and then whenever neccesay after that, just to get rid of excess moisture buildup. I noticed for the first few times of burping, when i got it out of jar it had got quite wet again, yet that stopped happening in the end. That's when u can lay off the burping so much.
Hope that helps mate.