I've never had the experience of butchering anything large, or even medium sized before, the smells and sounds do get to some people, its easy to ask yourself why your'e going to the effort of it all while your'e digging guts out aha though I thank the animals I kill for they're meat and pelt, I have an over active conscience with things sometimes.

On the note of Aluminium Sulphate, I purchased mine from ebay, I think in the US its sold as Alum or something aha, its as simple as soaking the fleshed pelt in Salt and Alum, getting the correct measurements etc, with the brain tanning I hear you really have to rub it in several times and if you get the solution on the fur side at all it'll slip the fur over time, a good oil for aftercare and you'll keep a skin going for years :D