Really nice, I love seeing resources like these! Thanks!

Since you're asking for input, (it's mostly selective commentary vs. actual errors/omissions, but) here you go:

> * NO AUTOMATIC SHUTOFF.

Caps and bold is nice but it actually wouldn't hurt to do more to stress that. Yeah it's bold, but what about italics? Red text? Larger font? Maybe some extraneous exclamation points? :P

*AVOID AUTO-SHUTOFF AT ALL COSTS!!!!! $20 EXTRA IS A SMALL PRICE TO PAY!!!!!11!!@!1

Joking aside, out of every single action I've taken since I started vaping, getting a scale with a 90s auto shutoff (that's what they say in the booklet, anyway - I'm pretty sure my scale is actually sentient and changes it to 30s whenever it's least convenient for me) was my biggest mistake by far. Abusing the tare button and hoping for the best sucks.

> I had to dump a mix because it powered off while I was adding an ingredient

If you're doing this professionally or mixing with someone else's ingredients this makes perfect sense.

If it's just an experiment for personal use or it's your own stuff to begin with (personally-owned stockpile and you're contracting/wholesaling to B&Ms) I wouldn't say chucking it is necessary: just estimate based on where you were and finish the job. If it's good, hey, you got lucky! If it sucks, remember your mistakes so you can learn from them next time. That's my approach anyway. :)

> I’m not going to even attempt to explain the math used to do this manually, just use a mixing calculator.

Why not? It's pretty straightforward - if you're mixing by volume you've already multiplied each ingredient's percentage by the total mix volume to yield that ingredient's volume; now you just multiply each ingredient's volume by its specific gravity to get its weight.

Example: A 15mL mix at 60%VG needs 9mL of VG. VG has a density of 1.2613g/mL, so you weigh out 11.35g of VG and you're set (15*0.6=9; 9*1.2613=11.35). Feel free to adapt/copypaste that bit if you like. :)

Yeah, I'm assuming our target audience once attended middle school and hasn't forgotten how to operate a calculator. Could be I'm just an elitist for being of the opinion that, for safety's sake, people who aren't at least as intelligent as a below-average 12-year-old probably shouldn't be mixing their own liquid. :P

Then again maybe that should be taken with a grain of salt, I was raised in the age of pens and paper and occasional access to a Macintosh II-series. Compare my experience to that of my daughter whose official school supply shopping list included "headphones for [her] iPad". For Kindergarten. At a public school. In a town with a population well under 5,000.

> The first few times you mix by weight are going to take a (relatively) long time as you get used to the process

Possibly "relative to how long it takes once you're used to mixing", but certainly not relative to mixing by volume even if you're a bit practiced at it.

Seriously, I did 12 new mixes in my last session, between 3 and 9 flavors per mix. First full run mixing by weight (third time using it for mixing overall) and I was done in less time than it would have taken me to do 5 mixes by volume with triple the margin of error.

I'm sure as I do more I'll get even more efficient at it, but relative to volumetric mixing this is almost implausibly speedy.

Thanks again for the post! Love it!

Good times, hope it helps.

Glad you found it useful :)

Thanks, glad you enjoyed it.

Sorry I'm not set up to do video.

Out of curiosity, what would a video provide that isn't clear in the post?