U18 & U19 (LM339's) done as well.  U19 previously socketed and changed (most likely due to batt damage) but checked under socket and buzzed out ok.  Replaced LM339 and replaced U18 - socked and IC.  That should complete it.

Jumpers existing repairs.  All tested and working.  The dodgy looking resistor also buzzed out OK.  I don't like the colour of the solder on all the resisters touched by batt leakage, but I reckon the solder pads will be gone, so not worth re doing.