I guess I was concerned about a short, but it wouldn't work then, at least it shouldn't. With my small aluminum piece on there it's not hot enough to burn you, but pretty toasty. I have to say I originally built with one sid, but adding the second for stereo effects increases the awesomeness of the SID sound 10 fold.
On a side note, does anyone know of C128s had 8580s in there or 6581s, or both?