heisenberg concentrate is £4 for 10ml at vapable if you fancy giving it another go. it works out cheaper elsewhere for larger amounts but if you just want to try it again...i used to have one years ago from a local guy who made them it was blue with like a berry menthol it was really nice but never found the name ive had heisenberg before that was my go to for a year or so then i got bored of it might be worth trying again if i make it myself. thanks