Thank you guys! I'm running two bases at the moment. I have labels left for V4 and will use those up until depleted. V5 is for new releases going forward, but the actual base is very similar (all the oils/butters are the same) but I've simplified the additives and the superfats a bit. I also switched to new side labels (the black ones with the topographic lines). The base version will be displayed there, by the ingredients. If there is NO base version listed, it's V4. If it's in an amber tub, it's V3. Hope that helps!
Sean
Sean