I have replaced a few of the lamp sockets under the playfield and I've had mixed success. One of them (4,000 blue insert) I've completely replaced and it worked for a while but quit again. I replaced the lamp and the socket. Anyone else have any issues with new lamps and lamp sockets not working? Is there anything I need to know about that braided wire that (annoyingly) connects all of the lamp sockets - like is it really important to solder that a certain way so it maintains the connection? Any pro tips are welcome, thanks!