For the longest time I have been waiting for a fly line manufacturer to come up with a slow sink Skagit head for still water application and SA beats everyone to it. No longer will I need to cut and join a bunch of lines to create my own intermediate sink head. This new line has Gary Sandstrom (creator of Wulff Ambush line) as the principle designer and I have no doubt will perform flawlessly given his credential. The only drawback for now is that it is only available in 400 grain onwards. I suspect the lower grain heads will probably be available later. More details of this line can be found here: http://www.flyfishusa.com/newsletter/082211/
Latest update .... Royal Wulff Products just released the clear intermediate version of their popular Ambush line - The Ambush Clear Head! The line is available with integrated running line from 5wt (215 grain) to 8wt (290 grain). You can read more about this new line following this link: http://www.royalwulff.com/products/ambush-clear-head-line/.
With this release, intermediate sink Skagit type head is now available from either manufacturer covering 215 grain all the way up to 680 grain.