JohnE,,,yes the eight lb is just a low ball number for quick calculation for myself to see what we require to operate. Mac operating with a mill head of 1 % > should show a good return,.but for unseen problems ( high strip ratio ) we know we can at least keep the doors open. I will do my DD on LIBERTY , as i have been out for quite a while , but looking forward to the long term. enjoy your day, Traps7