G'day batman, I have been away a while and see you are doing your head in with this variator. With regards to the idle not dropping back, if you mean while riding then slowing down, that could be that your torque spring is keeping your clutch running until you are almost stopped, I found the same thing when I put the 1000 spring in. as Art suggested, change one item at a time to see what difference it makes before moving on to the next. If you are using the stock torque spring I think 8.5 rollers would be too heavy. With regard to fly springs, I am using 1,500 and wouldn't go any higher. Sorry this is giving you so much grief, hope you get it sorted. If you can scrape up the money, a cyl. kit is well worth the effort. I sometimes think of going back to stock to see the difference..... but, nah bugger that, keep what I already have, not good but better than stock.
I am sorry nto hear about your friends, must be heartbraking to be there when there is not much you can do, but at least you can be there for them. All the beast to you and your friends.