I don't know if it's your first time using rebuildables but it's not the easiest one to build in my opinion for a new user......u gonna get used to it tho...
Always make sure the cotton is tight through the coil so u don't get spitback.....not anything crazy but tight so that the coil gets pulled a bit while u do it and maybe u need to hold the coil with hand so it won't bend...
About the leaks u get u need to add more cotton into the juice ports and u must try remember how much u put and the next time try a bit more to avoid leaks...
The juice ports should be filled with cotton....
A little bit a condensation into the airflow holes it's ok but leaking means u didn't used enough cotton into the ports...
Also in case u use 50/50 vg pg ofc gonna need more cotton than the 70vg for example...it depends the juice u use....
About the flavour in my opinion u run this coil very low watts....with the airflow open to 4 as u say u use in my opinion u should run it at 15-18watts or something...not less than 15 cause this coil is tiny but it's a fused Clapton 2x32/28 ni80...
also if the cotton is not enought and u get lot of juice to the coil then it's not able to vaporise the juice juice properly cause it's tooooo much for it.... and low wattage make it even harder...that's why maybe u don't get good flavour....
The hellvape md gives veeery good flavour so that shouldn't be problem...
Just give some time to yourself to learn to build it and make it work without leaks and problems and then u gonna find the right wattage for you to use it...
