Kenwood PS 50 power supply repair

My power supply would creep up to about 16vdc while using it with my TS430S. I would adjust vr1 to 13.8vdc and it would be alright for about an hour, then would start creeping or jump to 14, or 15 vdc. When pressing on vr1 the output would go back to 13.8vdc, upon release it would go back to 15 vdc. I cleaned, exercised it and lubed it with no-ox electrical grease. Now it would only go as high as 14vdc. When the board was flexed in the vicinity of Vr1 the output would change, going above 13.8 set point. I pulled the board and re-melted the solder on ALL solder joints. This video shows the test results. I actually tested it for several hours before making the video. It now remains within the specified + or - 0.7vdc of set point. I had originally thought one or more of the transistors where leaking and would need to be replaced. Not today I suppose. Note: The volt display is a modification I added so I could monitor the output. Drok brand I think.