I've just had a quick squizz at your site, and I'm really interested to know more about your 16MHz mod to the STe.
Is it really a simple case of swiping the 68000 out and dropping an '010 in, then just tapping 16MHz from the soundchip? I've seen lots of sites with regards to doing mods like this, and they give diagrams for making boards with 74LS chips on and stuff. What 68010 did you use, I've done a search on Google and it looks like there's several, ie 68010FN10 and 68010R12.