It has finally happened! With the help of Mike McCune, Scott O'Donnell, and Ed Ward, Rio is introducing unique sink tip system called the M.O.W. (McCune, O'Donnell, Ward). This is a tip system these guys developed over the years and guiding and fishing skagit lines and having to alter tips to meet their demands. I was fortunate enough to learn this tip system a number of years ago from Mike and have been fishing them for a couple of years now. The M.O.W systems consist of 2.5', 5', 7.5', 10', 12' sink tips and a 10' floating tip. For example, the 2.5' tip has 2.5' of T-11/14 integrated to a 7.5' section of floating line. 5' tip is equals lengths of T-11/14 and floating line. This was the 2.5', 5', 7.5', and 10' sink tips are all 10' in length helping to keep a more consistent anchor. This tip system is ideal for switch and spey rods in the 11'-13'9" range and will come in T-8, T-11, and T-14 varieties. Look for the T-11/14 systems to be available by early May and the T-8 by fall. All kits will retail for $149.95 with a leader wallet. These are a must for any two-hand angler.
For more info check out the Spey Pages thread