RA is blue, grey, red. So it´s X100. 67K.
1. Is it really a risk? Now it´s 67K.. I could try 44k for example.
2. The "Guru" is unknown. Might be dead as well...:/ But that would be the best solution - Increase the R2 value.
3. That´s what the "Guru" did. He baypassed second printed resistor of the divider with RB. To replace all of them seems like a crazy task. Not sure do I have skills or the iron that small....