All right, I'll take a stab at it although I'm no expert either. I've never used the Arista kit, just the Tetenal, Afga, and Kodak kits:

Quote Originally Posted by wildbill
Once mixed how succeptable are the developers to daylight?
Beats me. Probably about the same as most other chemicals. Store them in the dark to be safe.

Quote Originally Posted by wildbill
Anybody get more rolls out of it than the capacity states?
Probably not a good idea, unless you're going to scan the slides right away and aren't worried about them deteriorating after a few years.

Quote Originally Posted by wildbill
Is room temp okay for prewash and the middle washes?
Based on the Tetenal instructions, a prewash is a bad idea. The wash after the first developer should be within one degree of 38C, and any other washes should be within four degrees of 38C.

Quote Originally Posted by wildbill
How long is this stuff good for after it's mixed?
One to two weeks for the first developer. The other chemicals are longer.

Quote Originally Posted by wildbill
How long should the concentrates be good for once opened if kept in tightly capped bottles?
Based on other posts I've read, maybe six months?

Quote Originally Posted by wildbill
This kit doesn't say anthing about a "stabilizer", Is it already in the chemicals?
No idea. The Tetenal "3-bath" kit is actually three baths plus stabilizer (included as a separate liquid concentrate). I would have thought other three bath kits would also include it?

Quote Originally Posted by wildbill
Is a separate stabilizer necessary for velvia,provia,velvia 100?
I don't think you need different stabilizers for different brands of film.

Quote Originally Posted by wildbill
Can i dump any of this stuff down the drain?
Probably not the ideal solution, but I don't have a better one. Just run a lot of water after it to dilute the effluent.

Jerry