Schematic wanted: Crest ultrasonic cleaner

So they will not have released a schematic. Perhaps Google/Images with something like "ultrasonic cleaner" pcb and maybe find something rebadged, with extant markings. As the power side of UCs seems to be unsually IC free, even more likely in 1990s, any ICs would probably be just for timing and control, so isolatable if lucky

Plus side of IC grinding is that they probably used industry standard CMOS/555/etc rather than ASICs/PICs and similar that would need no sanding off

The DIP-8 I'm focusing on right now looks like it might be a standard dual op-amp. Analyzing the circuit to see if there's anything special that the op-amp needs to handle...