pnearn - this sounds like a one way ticket to yipsville to me! However with putting whatever gets the ball in the hole, use it! Seriously I dont think this is a proper cure for putting ails - letting one hand dominate another could lead to problems down the line.

I have two thoughts (and by the way my putting has not been great for a while so i am working quite hard on it myself right now - i am however good from 10 feet in).

first thought - read Dave Pelz putting bible - just finished it myself and have learnt lots of useful tips. One thing is that putter path is no where near as important as face angle at impact.

second - DO NOT WATCH THE PUTTER AS YOU GO BACK! I got in into habit of doing this and it wrecks your putting IMO. Just look at ball during stroke and concentrate on hitting it solid.

The above are just my opinions mate - hope they help

nick