Yaaay, I have always wanted one of these. I have a question though. I am hesitant to put this in my IIsi. Last time I added an accelerator card to a IIsi, I fried it. I vaguely remember there being some difference between the IIsi and other II's that prevented you from using certain cards. Any ideas on this? I'd love to get this up and running in my IIsi. I have the following:

Dual PDS adaptor

Radius Pivot Adaptor with two PDS slots (neither slot has any indication it is other than a PDS slot)

I am guessing neither of these will help me.

Since accelerator cards I've owned before have worked in my IIci, I am guessing that I need something that converts the IIsi's PDS slot to a IIci style cache slot (PDS with more signals??)

:O