I agree, to make F10 dynamically change with the recipe definitely complicates things. Again, the overall strength of flavor in the vape is subjective. My thought was just that recipes with several stronger flavorings would probably require a less overall ratio of flavorings compared to a combination of weaker flavorings.
So, you usually do about 5% flavorings Dan? I am still yet to make my own juice (have everything I need, just using up my pre-mixed juice first), but I was thinking more like 20% flavorings...... eeek.
I always start with 5% and add as needed, you can always ADD LOL... subtracting is a little more difficult.
Dan