I brew all grain. Have a 8.5 gallon SS pot, 1 burner , a converted cooler(rectangle) for a mash/lauter tun and a chiller.. I have plenty of hops in the freezer. I came into some cash ($600)and would like to improve my setup. Any ideas on what to get? I was thinking O2 and a stone. Maybe spend some money and convert the 1/2 barrel keg I have into a keggle. Or pickup a second cooler and a march pump for recirculation. Wadduhyathink?