The expansion gives you 5 slots but costs one in the CPU. Mine contains two phone cards and I have another two in another machine, I wonder what cool audio shenanigans one could get up to as a musical platform with all that?Haha four of them wow! I’ve heard of the expansion box but never seen one, that’s cool you have one. Can’t believe they even made such a device. You’d think 3 slots would suffice. Do you happen to have one of the rare Ethernet cards kicking around? The 1.5MB RAM card, that’s a nice one to have.
No, no ethernet cards.
Somebody really should just make a retro ethernet card for these, and toss some RAM on for good measure. Seems like every other platform has some heavy retrocomputing support but apart from MFM emulators, I don't recall seeing anything for the 7300/3B1.