To make life easier and get a little more depth out of a sinking tip without the extra weight get some braided mono and use that inbetween the flyline and your sinking tip. I learned this trick from an old timer and it seems to take some of the bear out of casting a heavier tip. Loop to loop everything up and changing everything is a breeze. The braided mono seems to be pretty good at dealing with energy transfer.

I usually use 2-3 feet of the braided mono as my butt leader anyway so I just loop the tip on and then loop my leader on to that tip. The sinking tip pulls the braid down with it so it is like adding 1-2 feet of extra depth with out the extra weight.