Do you know GVP made TekMagic for A4000T?
(Veeery late to the party but whattaheck... I was googling for DSP3210 Zorro cards.)
To quote from your review "Other Zorro slots are used to connect DSP board ". Now _that_ is potentially much more interesting than another 68060 board. IIRC correctly the DSP3210 tech that C= was intending to use walked out the door with one of the employes(not as in stolen, but as in using the know-how to build what C= did not) and was made into a Zorro card. That could be that card.
I would much rather have the DSP card than the 060 one. Do you know the whereabouts of it now?