@tact where did you get ROM chip for your Radius card? I need one for my NuBus Radius PrecisionColor 8-Xj discussed here.
It lists v1.5 however there are later versions.I started with the Radius card with no software installed. I noticed a Jumper JP1 see at the lower right of the chip with the sticker on it:
It is hard see in this photo but it has 3 pins. In each NuBus slot I tried the card with the jumper in each position (leftmost pins, rightmost pins, and off). In all 9 cases Slot Info was not able to see the Radius card.
That's the part I've used on my SE30 recaps and it fits fine (it looks just like the pictures in this thread). I used some heat shrink tubing on one of the legs that has to fold back under to get both legs in the holes.
My Radius Pivot PDS card (for SE/30) has a 1992 date printed on the ROM, version 2.2. U6 & U7 are soldered RAM (VRAM?) and there are 6 RAM sockets free. I just posted 4 high resolution photos to my Flickr account: