Im about a week away from getting my frist 8x10 camera. I plan to start trying out pyrocat-HD and AZO/Amidol. Ive never had a densitometer, but I have looked extensively for a local one that I could gain access to. No luck whatever. After I get started with 8x10, I wont have enough left to buy a densitometer. My question is this: Is it absolutely necessary that I purchase my own. If it is a good idea to buy my own, which brand/model? I would really love to refine my technique and start producing better contact prints than I am now..