I don't worry about figuring water loss. I use ounce measurements for most of my recipes unless they are very small test recipes for lotion or deodorant. Entering specific gravity for every supply may seem overwhelming at first, but once you get it accomplished to begin with, info. for supplies purchased in the future won't take nearly as long. My advice is to enter all the pertinent information when entering a supply, it will save you time later on. If all of the INCI codes are entered, then when you need them for a label, you can just print them out from the recipe menu. Suppliers, weights of each supply and price will help keep track of production costs and and an up-to-date inventory. Just grit your teeth and continue, you will be glad later on