That's all the capacitors on the logic board replaced, and the damaged trace now has a layer of solder over it after having a little clean up with a fibreglass pencil. 

board washed down with 99% isopropanol, then deinonised water, left to dry for 24 hours on a radiator, and it booted first time.  when i can find the ink cartridge for this printer i'll test the serial ports, but ADB works, and so does SCSI and sound.  I'll tackle the analog board soon, and then get the retr0brite out for the case

now  just need to get hold of a larger drive, and get some disks to reinstall the OS