Yeah, love the sour fruits too, gotta go with a glass tank like Mr. Face Meat said, because fruit flavors without citric or malic acid for the tart and sour are simply lame, but all that acid, when it hits some polycarbonate tanks -- boom goes the dynamite. Try TFA (oil free) Lemon flavor, but zap it with some acid. The oil flavorings don't hurt plastic or glass but are not good for coils or good to vape. So, if I got this all right, it seems that:
1. Flavors with oil don't hurt tanks but are never okay for any set of lungs or coil.
2. Flavors with acid are okay with glass tanks but may fracture polycarbs.
3. Flavors as-yet-untested like Tuna & Anchovies w/Garlic may yield Chernobyl-like results.