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blue, grey, red give 68 x100 = 6.8k, not 67K.
This is better than 680, but certainly lower than the initial value of R1 (when I had to fix my own AT issue, Kent Spong suggested a 82k value for R1).
I fear that reducing RA from 6.8k to 4.4k won't be enough. Remember that you wrote 14.8V and 14.2V at both sides of R2. This is not much.
You could perhaps try with a potentiometer instead of the RA to determine an adequate value for RA. Starting with say 5k and reducing progressively and cautiously.
(By "printed track + silicone glue" guru I meant someone who could help you with his knowledge of how these materials interact, not the one who bungled the board ;-)