I have always used Lutan-f. Just follow the directions and you won't screw them up. You'll probably lose more hides due to not skinning soon enough, cuttin' them up, and during fleshing than anything else. I only flesh with a pressure washer now and have for the past few years , and I never lose any. Go in the tanning forum on taxidermy.net and there's some gal from California who gives a pretty good tutorial on it. It is messy but I can get a dog done in 10 minutes. I can do a hide for about 6 dollars and it really isn't that hard. If it was, I would just send them out. It is time consuming but the vast majority of that time is spent soaking and not actually doing anything. If you get them ready to send out, you HAVE done all the hard work(in my opinion). PM me if you need any futher help.