Got my scale on Sunday, so I now have four 20ml single flavors mixed and steeping (used 30ml bottles for shake room): PUR Sweet Tobacco (7%), OSDIYS Lotta Latte (10%), OSDIYS Lucky Shot (10%), and PUR Butter Mint (5%).
Measuring by weight was quick & easy, but I really need to learn patience with that scale though... It takes many seconds for weight to register. I was off by a few hundredths of a gram for almost everything, even though I knew it was slow when I bought it!

Having nothing more to do but put away the supplies afterward (no washing) was a breeze!
The percentages I used for each were numbers that seemed to work well for others, so I ran with them. All smell good so far, so I can't wait to see what I end up with. Any experience on any of these flavors and your percentage (SF & mixes)/aging guidelines? I'm already contemplating mixing a couple of these together... For Science (hence the larger SFT size).
I may change one thing going forward though: I read somewhere that 100% VG was better for storing nicotine (due to the viscosity of the VG when it is cold, keeping it fresher, something, something...), so that's what I bought. Due to the viscosity, it is much more difficult to measure out correctly for me. What bases are your 100mg nicotine in and why?