Hey guys, I have a 60s SB-12 that is much loved for its recording tones. Seems like some of you do too. I don't want to mod the cabinet with a jack, since it's all original (other than 3-prong cord) and in great shape. But I've had a few takes here and there compromised by intermittency in the connections. Yeah, stating the obvious, I know. Anyone have any tips for how to secure these connections or bypass without modification? I did some searching around and seems like I saw a thread that mentioned foam inserts, but I can't find it now. Any advice would be much appreciated.