my build using the 600 action is slowly comming along. onto the base issue.. seems aluminum is my only option perhaps? I would be ok with aluminum if the slots were full width, but after looking at an EGW base, not enough meat there for me. Got ahold of them and after a wait for their "HD" bases to be made, they would run upwards of $150. I've heard the Rem 7 3 hole bases fit the 600, but other than a Dednutz haven't got much further. this is where I'm at.. any help or sugestions much appreciated