Cool, you answered one of the big questions I had as far as the mixing process. Most commonly a liquid will blend better with another liquid, if it is heated. Boiling helps liquids blend even more, but I ruled that one out on my own because I didn't want any steam leading to a loss in liquid or nicotine. Microwaving the mixed liquid or putting it in the oven would probably crack or melt the bottle, so I wouldn't trust that either. I was actually planning on using water like you mentioned.
My idea was to get all the liquids, in the right proportions, into a the bottle I would vape from, shake for a couple minutes, then close the bottle and put it in a pot of hot water. I may put the pot on the stove top and put it on the lowest setting for 10 to 20 minutes. My idea was to get the liquid inside warm to slightly hot without boiling it, then shaking it again from their. I don't know if this was similar to what you were doing but I'm thinking that heating the liquids will help ensure they blend well.
You are right, it's basic physics: heat speeds up blending by increasing molecular activity. Heat also reduces viscosity - think of the oil in your car engine.
But I consider it unwise to actually boil a soft-plastic bottle, or microwave it. Simmering is completely unnecessary, 212 degrees is HOT. All you really want is to warm the liquid to reduce viscosity and accelerate mixing. Immersing the bottle for 5 minutes in very hot tap water is fine, then just shake again. I don't know this, but I suspect that certain molecules in flavoring can be altered by very high heat, though it might depend on the specific flavors involved. (Makes sense - high-voltage is too hot for some more-delicate juices, there are MANY reports that HV completely changes how they taste.)
I don't have anything against 100mg base, just saying - be aware of the dangers, exercise care as you seem to be, and give yourself MORE elbow room than you think you need even if you're super-coordinated (phones and doorbells can ring at the worst possible moment! - keep pets and kids outside, don't allow distractions). Gloves are good, but remember you also have skin elsewhere and you REALLY don't want to get any of this stuff into your eyes, particularly. If a splash or spill should occur, don't panic or rush, just clean up yourself first, then the work area. My personal first rule about DIY is - don't even think about mixing in a hurry! Allow more time than you think you will need.
I haven't seen anything about the test kits being undependable, but I don't have first-hand experience so my opinion is irrelevant.
Seems to me that you are being very intelligent, you're developing a plan, a methodology, and tempering your impatience to get on with it - waiting until you have everything in place and have done as much research as possible before you begin. It's just like cooking - read the entire recipe before you start, assemble your tools and ingredients, make sure you've got everything that you need... and THEN dive in well-prepared. You will refine your process with experience.
Some people have even practiced using their measuring equipment using only water at first, even though the real ingredients are thicker and slower. Patience, especially when waiting for the full measure of VG to exit that pipette! It helps to warm the bottle of VG to reduce viscosity but that stuff is still really slow, no matter what. Add 3ml of VG from a pipette, then watch VG creep down the inside walls of the pipette and collect at the tip... after a couple of minutes, there's at least .5ml still left in the pipette that did not go into your mixing bottle. Be aware how that could throw off your measurements.
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