Thanks for sharing the knowledge bro.Dont give up. Since you already have it, might as well make the best use for it. I would suggest skipping wintergreen to be safe. Use strawberry but start with 5%. Go up from there in increments of maybe 3% or so. You'll fail even with local flavours. But that's the best thing about DIY: Looking for the perfect taste that fits you. Good luck.
Much appreciated.