Currently, my M1A has a "thin" sided USGI stock from what I gather by reading Scott Duffs book. Hence, it is not suitable for bedding according to said book. I am considering a Boyds replacement and am not sure which to use. Maybe the one that is already cut out for bedding? Or the heavy one and do the cutting myself? Any input would be appreciated. Also, in Duffs book he makes reference to a "slave" barrel for gas system modifications. Where does one find one? Thanks in advance.