HOUSTON (AP) — Astronauts tinkered Sunday on a troublesome piece of equipment which can convert urine and sweat into drinkable water once it’s functioning and allow the international space station to grow to six crew members. Station commander Michael Fincke and Endeavour astronaut Donald Pettit changed how a centrifuge is mounted in the $154 million water recycling system. The centrifuge is on mounts and Mission Control asked Fincke to remove them and bolt it down without them.—-Contact The Daily Reveille’s news staff at [email protected]