HI been running my OS 61 SF on a 12/6APC must say i am very pleased with its performance-but more than one reply i have received said to go to a 12/10 APCto be running in my- power band- see just when you think you know it all-POP-the bubble breaks- trust me i do a lot of research- but thanks guys -that is what all this discusion stuff is aboutto learn and improve what you are doing- i will give the 12/10 APCa trymy SIGSUPER KAHOSis going to be a bearto handle if this works- it is now