Patches and discussion for Ensoniq VFX family

Has anybody done the now famous keyboard hard wiring fix on their own or has everyone gone to a technician? I have one of the offending VFX units that the keyboard suddenly blasts a batch of note on messages and then freezes. I don't get a calibration error but I do get the freeze up. I once had a diagram that showed what to do, and if I remember it seemed simple enough that you solder a wire from 1 to 1, 2 to 2, etc... but I am hoping to hear from someone who has done this before to see if it is as simple as that or not. I love the sounds of the thing but it isn't much good to me if it freezes up.