RE: Ultrasonic Cleaner
This might sound a bit crude but I used to this years ago when rebuilding auto carbs
and I didn't have money for fancy equipment.
Get a metal tub large enough to fit your needs. Firmly mount a small AC motor to it.
Attach a collar to the motor shaft with a extra long set screw. (This will put the collar
out of balance) Set the tub on a layer of soft foam.
This contraption will vibrate and agitate the cleaning solution considerably and can be adjusted
by varying the set screw.
Like I said . It's crude but it works
Regards,
Roby