Modify? :-*

< /snark >

I have a feeling we'll find that out very soon, I just looked at my Microquadra MoBos and one of the Q605 pair has the ROM SIMM thru-holes populated! 8-o

So, despite my snark, cleaning the solder out of the thru-holes and installing a SIMM Socket in your 475 can be considered a factory option package refit.