In a word... "No." 8-o
(You would have had to read through this entire thread to see the reason why.)
Again, read through all the threads (this one and the 2 AppleFritter threads) I've linked for you in my previous post. That will eliminate my having to repeat things that have already been said, and it will bring you up to speed on the dozens of questions that others have asked me before (with my detailed answers). Nevertheless, I feel compelled to say this again...
The ROM is irrelevant to this problem (as is the "cleanliness" of the ROM connector contacts). Utterly and completely irrelevant. The "strange artifacts" occur even with the stock SE/30 ROM, (and yes, I've tried more than one stock SE/30 ROM too).