I have been using the SR stardust's that all meter 2.2 to 2.4 across the gammit. I notice allot of reviewers push these things up around 4 plus volt on the LR's I find if i go past 3.8 the sr's start tasting burnt with all my juices. im happy with them at lower watts, i still find a Kr808 mini set up quite satisfying, Just wondering where you guys set the dial on these things. Im sure juice plays a considerable role, however just figured id shoot it out there.