Hi, I really like my Vision Mini Vivi Novas. I've discovered the best place to get them is from Liberty Flights. Good price for the mini vivi which comes with fitted 2.4 ohm head, instead of having to buy a set which comes with additional 1.8 ohm and 3 ohm heads which I don't want. However, their replacement heads are £3.99 which I thought was a bit steep, so I bought a pack of 5 from Vaperone for £8 which are giving me a burnt taste. I'm having to vape them at 3.7V instead of my usual 4.2V which isn't very satisfactory. I've bought perfect replacement heads before but can't remember where from. So after a bit of googling I've bought 5 from vape Escape to try them. Has anyone had similar problems, and do you know if the ones from Vape Escape are going to be as good as the originals?