Glad you are having success early on!

That makes wanting to DIY all the better.
Just be careful not to fall into the all to common belief, that more ingredients, mean better results. Having 7, 10, even 15 ingredient recipes may look like they should be better. But, though layering can make sense in
some situations, it does not mean it is right for
all situations.
Don't worry I won't....although the above recipe has quite high percentages it has always been my idea to keep this low. I may try the above at same ratio/lower percentage with a long steep.
I see more successful mixers, reverting to 5, 4, 3, even single flavor recipes, as being more satisfying. Rather than needlessly complicated, muddled, confusing, unsatisfying complex recipes.
Agreed.
Please understand; I am
not saying that there is no place for a complex recipe. Layering can fill in an incomplete ingredient. It can add depth and interest. It can take "good" to "incredible." But, function must meet, or exceed intent. Otherwise, you end up wasting needless ingredients at best, and creating an unvapable mess at worst.
I would suggest starting with the fewest number of ingredients, you think are required to make a given recipe, and then fill in the missing notes as needed.
Yes...this is good advice thanks.
Having a good working knowledge of your individual ingredients helps too. Single flavor testing may be boring, and not particularly satisfying (though I have found some surprising winners). But, the information learned from doing so, can be invaluable. And, the time saved during later recipe creations, more than offsets the initial time spent.
I know I need to do this but have been too eager to get mixing so far
This, of course, is not the only (or the "right") way to mix. It is just what has worked best for
me. Anything that keeps you off cigarettes, and is most enjoyable, is the right choice for
you.
I would add one caveat to volume mixing: leave that for recipes you have already tried and
know you like.
I rarely make even a 30ml batch of a new (to me) recipe. If I am trying someone else's recipe for the first time, or creating something from scratch; I only make 10-15mL, until I see how I am going to like it. For single flavor testers; I find that 10mL is fine if I am expecting it to require aging, and I expect to be doing repeated test vaping along the way. If it is something I think won't require much time; then even 5mL is plenty.
Agreed, I have 6 30ml steeping and am planning on making 1 per week from now on so that I always have something ready to try.
Keep in mind; the larger the volume, the longer the time to mature. A 30mL tobacco recipe may take a month to come into its prime. While a 500mL batch, of the exact same recipe, can take 3 months, before it really shines.
And, as for test vaping an unfamiliar mix; I see no problem with this. In fact; I encourage it. I, personally,
like to know how my mixes develop. If I am working with something that is completely new to me; I like to taste immediately after mixing (usually), again at 24 hours, again at 3 days, again at 1 week, and then once a week thereafter, for at least a month...
before I consider making any adjustments.
(I have seen more notice mixers ruin a mix, by adding "more," before the recipe has a chance to bloom. Then, when it is finally given a chance to mature, it is over-flavored, unbalanced, and difficult/impossible to fix.)
I have experienced this already with a mix that onced it had aged a bit turned a bit nasty...vapable but not satisfying and definitely worse. I put too much in to start with
)
On the other hand, if I am working with ingredients I am familiar with, and
know one or more of them requires
X amount of time to come into their own, I will skip early test vaping.
Just one personal example of "early-and-often" test vaping: I had always read that "all tobaccos require at least a month to taste their best." I took this as gospel and never vaped the few tobaccos I tried until they were a month old. I was not impressed with
my results.
One day, I read someone saying that they liked a particular tobacco concentrate after 3 days, and I happened to have that concentrate. So, I decided to apply my normal testing regiment (as described above) to a fresh mix.
These were my findings: immediately after mixing... nasty;give it more time. After 24 hours... still fairly unpleasant, but I can see something promising, give it more time. After 3 days... I'm really beginning to dig this, lots of fresh/grassy notes and light tobacco background, I can start vaping this. At 1 week... this is awesome, still great fresh/grassy flavors, but more balanced with a richer but not overbearing tobacco foundation. At 2 weeks... not liking this as much, grass is disappearing into a deeper, darker, tobacco. After 3 weeks... Tobacco has completely taken over, all the things I liked about this are now gone.
So; what did I learn? That, for
me, I like Inawera Am4a, best between 3 days and 2 weeks, and I should not make more than I can vape in that time. And, I found a single flavor mix, that remains one of my favorite all day vapes to this day.
Yep...a lot of people are saying this. I get it but it seems kind of counter-intuitive because I started with the idea that all mixes should reach a stable point to allow for storage over the long term. Obviously with DIY you can mix anything at any quantity so its doable. I suspect that this happens when ingredients do not react well together (chemically) but at the same time taste/vape nice early on.
I guess, what I am trying to share with you is; to do your due diligence, try to learn from all those who have already paved the way (they can help prevent the need to reinvent the wheel),
Nice to hear that I am welcome to do that...some of the guys on Reddit are not nice!! To be honest its exactly what I have been trying to do... Thanks again for the very useful info 
but always remember that there is NO other mixer exactly like you. You have a palate that is unique. Learn what that is, keep it small, taste often, and enjoy the journey.