JDW, when I talked with you in PM you told me the IIsi rom still produced the strange garbled artifact that I (and everybody else) get with the IIfx rom. Did I misunderstand what you said?
So now, are you saying that with the IIsi rom, the SE/30 boots 100% normally, as if it had the stock ROM and a 100% working logic board? Have you tested this on more than one logic board?