March 31, 2009 Investing with the inimitable Ken Heebner, of CGM Focus (CGMFX), is always a bit of a roller-coaster ride, but the past two years have been ridiculous. In 2007, CGM Focus soared a majestic 80%. Then, in 2008, the fund fell back to earth, plummeting 48%.When Heebner is on, he is really, really good. But when he's out of sync, he can be awful. Over the long haul, though, his results are quite stunning. At last check, Focus looked pretty tame, with about 10% of its assets in dependable Abbott Laboratories and 28% in insurance stocks. Read about all of the Kiplinger 25 funds.