Great idea to do a DIY video
thread Jeff to help new people and even long term vapor's looking to get into DIY.
Just a few thoughts.
6ml test batches work well for a new mix's, this way if you don't like something you don't waste 30ml's, and you can adjust the recipe as well before you make a bigger bottle.
I use 10ml syringes with huge blunt needles for my VG/PG and Nic base, never spill a drop this way, and smaller syringes for my flavorings. I also sterilize my syringes and use them more then once to save, as long as you clean them up properly they can be used more then once.