It wasn't so long ago that the guys of Boulder-based OAITW were a decent-enough disc-tossing bunch. But they weren't getting any younger, and so a couple of years ago they decided to do something so drastic it is virtually unheard of in many Frisbee circles: practice. It paid off. In 1999, the masters-level (a mere 33 years old and over, in the skewed view of disc throwers) squad won the Ultimate Frisbee national championship. That, in turn, qualified the team to compete in last summer's quadrennial world championships, held in Germany. The team members, some of whom are actually in their -- gasp! -- forties, won. Three more years of bragging rights.