[Texasrocker]

I have found that my handheld dremmel-tool comes in very handy (with small metal cutting disc attached) does a nice clean job *opening* up those old Philco tube shield bases to accept the RCA metal-type tubes also if needed! Orig shield still fits if your careful in the modification also. (to keep originality).The dremmel tool also works well for carefully removing old orig rivets on all tube sockets if broken (need replacement) , or to change out tube shield chassis mounts from model-to-model replaced with a couple new rivets. Harbor Freight also has a low-priced version of the dremmel tool w/ accessories kit that is much less expensive!! Even tho I dont need to use it often, it sure comes in handy when I need to address replacing broken tube sockets, etc, spkr trans mounted to spkr, etc. Sure beats drill-bits for those *touchy* jobs!!