Thank you all for your replies. Part of my challenge for the 3400 is to keep the drive small since I like System 7 and it doesn't like large drives (unless they're partitioned), but after reading alk's post, it sounds like a modern drive is the way to go. Plus it feels funny to put a used 10 or 20 gig drive from a Wallstreet in there.

The 2300c seems cleverly designed for future storage options. Byrd, I thought about mounting a new HD in the 2300-its good to know about the mounting issue. I'm still in awe of its small form factor for 1995. Making it silent with a CF card would make it even cooler.

Thanks for the electrical insulation advice, Beachycove. If I may ask, how did you install the OS onto the CF card in your 2300c? I am away from its DuoDock II and have no external CD drive, so I was thinking I would put it into a PCMCIA adapter and load 7.6.1 from my 3400c.

LCGuy: I had seen on Intech software's site a few months ago, a driver to work around the 120GB limit on the HD controller for OS 9. I'm tempted to try it out and put OSs 7-9 on different partitions.