I use higher range carto personally .. I find them less likely to pop .. and can use higher V's
when (if) they do go I have a trick if they are in a full tank .. just take the drip tip out ..insert the bottom of a new carto down onto the top of the old (keeping it tight) and push through (remember to prime the carto with juice first!) walla .. carto changed.
TBH i have never had a higher range carto go ... ever .. I get anywhere between a week and 3 weeks with one before it tastes so horrible I have to change it.
I've had carto's get the burned taste but normally after 4-5 days.
I dont like DCC very much and find their vape harsh and airy. However, once you get a burned taste, its impossible to get rid of in a Carto. Make sure you have the filler soaked completely to the bottom. Use a blunt tip needle to push between the filler and body to the bottom and fill that way.
When they go burned, pull the filler out, give it a good rinse, and you will have a "Dripping Attie"
Boges aren't dual coil no to my knowledge. I quite like Bottom Coils too. The coil is, funnily enough, at the bottom so it stays wet longer. The performance isn't as good as a Boge though IMO. Smooth Vape and strangely they work well on the SDKs