PLJ-8LED (clone): fixing the other module

In the previous video, you saw that my first PLJ-8LED module was inaccurate and as these are cheap, I got another one instead. But as this video demonstrates, the adjustment problem is easy to fix. But while it can be adjusted, the power-on drift of this oscillator is a bit worrisome, especially since the other one does not show the same behaviour. Previous video on PLJ-8LED is here: https://youtu.be/WWy0821JLUQ