This is exactly why I am making a Quadra 630 into a self-contained custom machine. Not sure about space savings (if I had placed the power supply on it's side, I could have made it a lot slimmer), but I did remove the HD and CD-ROM drive and replaced it with a SCSI2SD. Planning on having it upright, mounted behind a cheap LCD I got at Goodwill. It will be a really nice non-internet-connected game machine for my young girls. They already have had a blast with the partially assembled machine using Kaboom! to record themselves :).