Here is a very useful tutorial from the people at New Amsterdam Vape.
If you have never made your own juice then this will show you the important steps you should follow and why.
It shows you how to get the calculations right and be safer.
How to make your own E-Liquid
http://www.newamsterdamvape.com/#!shopping/pootm
Some of my personal favourite recipes :
http://www.newamsterdamvape.com/#!recipes/cjo8
Steam Engine E-Juice Calculator : http://www.steam-engine.org/juice.asp
DRILL CLAMP : https://www.fishersci.com/shop/products/castaloy-three-prong-extension-clamps/p-30559