The gurgling issue can be quite troublesome. Mine still seemingly does it after refills. Best thing is to fill it, then let it sit...if you start getting juice hits stop hitting it and take a paper towel piece and wipe the tip and take the tip out and wipe around the brim.
As for it blinking and shutting off on you thats more than likely having everything too tightly twisted. This happened to me. I simply just screw the coil on(with a paper towel piece) enough until its tight, turn then when it stops turning under regular force leave it, should fix your issue. Same thing with the top mouth piece, just screw it on till it stops.
I also dont max fill it, usually fill it till its about 2 lines below the max fill bar.