when you've got just 3 days, every minute counts

My plan is to enter Uzbekistan from Shavat-Dashoguz on 14.12 later in the afternoon/evening and exit on 17.12 early afternoon from Andijan-Osh, which sums up to 4 calendar days, but less than 72 hours.
Can anyone advise me on that?
Also, does anyone know when the Shavat-Dashoguz border closes? I only found that it opens at 9:30 am.
Thanks a lot!