A while back, a fellow hobbyist generously traded me an XLR8 Mach Carrier ZIF card for a Sonnet Crescendo G4 card (I have the rare late revision PowerTower Pro that "cannot and will never be able to" run Sonnet cards, per Sonnet.
And the ZIF card worked pretty well for a while. It was spotty...
While recently restoring a LaserWriter IIg logic board, I remembered that these boards have an unpopulated, but apparently fully connected, pad for a 68881 FPU.
Has anybody installed a 68881 to see if the board will make use of it? I'd expect that it would provide some significant speed...