@OlderNDirt, a couple of
general thoughts...
Lemon flavors (in general; and
only from my own experience) can be rather short-lived. They tend to be more aromatic (by which I mean: dependent on smell in order to perceive flavor) than most(?).
I only get about 1½-2 weeks of "quality" vaping from stand-alone lemons; then the flavor fades rapidly. It also (to
me) is not suitable for any sort of heat treatments. I have the
impression, that whatever makes up the flavor molecules for "lemon," are extremely volatile and dissipate if you look at them cross-eyed.
I mention this, because this may be a flavor better suited (at least as a stand-alone) to shake-n-vape vs. steeping... at least for testing purposes. You had mentioned a five day steep, and then a few days more. I don't know if you applied heat, or had excessive headroom in your storage bottles, but I have found both to be detrimental to lemon e-liquids.
Another thing, that
might cause early/excessive flavor fade, is excessive frothing/aeration. I don't recall how you prefer to mix, but if you use an electric stirrer/frother (or even a magnetic stir plate), try to use it as little as you feel comfortable with to get adequate blending (for this particular flavor).
All that said, the reviews I have been able to find, seem to be all over the board. Everything, from it is "awesome," to "Weak and no/little flavor. Need to supplement with other lemons and/or crusts." So, it is quite possible this flavor is one of those; that is a winner for some, and a loser for others. It could also be due to mishandling.
Likewise, (for those who stated them) single flavor preferences seem to be all over the board, as well. I saw a low of 4%, and highs of 20%. So where you go (from 10%) is anybody's guess.
As a bit of a lemon fanatic; I have come to adopt the following as "best practices" (for myself) when mixing lemon dominant recipes:
- Never use any heat. Don't heat a fresh mix in any fashion. Don't heat other ingredients that are to be added to the recipe during mixing (e.g. VG (in order to thin)). (Ultrasonic cleaner also seemed to accelerate/amplify flavor loss.)
- Minimize exposure to air. Stir as little as possible to blend (shaking in a closed container is best; but I still tend to use my little Badger hand mixer sparingly). Fill the bottle to minimize excess headroom. Multiple smaller bottles that are kept full, and then used in a couple/few days; seem to last better, than one large bottle that has lots of headspace for an extended time.
- Blending with other flavors may help to stabilize the lemon and make it less(?) volatile. That said; some recipes seem to hold up better than others (for me). I have not been able to put my finger on what specific ingredient(s) are helping to prolong/extend the lemon notes.
- Make small batches. Because, regardless of what I do to try and coddle my lemon mixes, two weeks (rarely three) seem to be the max (unless more lemon is added; when the fade begins).
DISCLAIMER: My thoughts are based solely on my own experiences with various lemon concentrates. I HAVE NOT tried Lemon Meringue Pie V2! I have used LMP V1; but only in one recipe, and not as a stand-alone. (And that one recipe uses the addition of CAP Juicy Lemon,
and FA Lemon Sicily, to support/fill out the CAP LMP V1.) Others may have vastly different experiences.