In the U.S., Sears sells a nice 6" shaft T-15 screwdriver that works great. I found one in person at the Sears in the local mall.
If you don't have expansion cards for your SE/30, then switching chassis won't be necessary. (Network cards and video cards for the SE's PDS don't work with the SE/30 logic board at all, and vice-versa. The gap over the PDS in the chassis for such cards in the SE is smaller than the one in the SE/30, so big SE/30 cards won't clear the SE's little gap.)
Be aware: any time you put the plastic back of an SE on the front an SE/30 (or SE/30 on an SE) they may not fit perfectly. I've had SE/30 backs on SE fronts and the fit was very snug. Getting it back off was a pain. They were made to the same specs, but they were different dies, so there are slight variations.
There's a thread over in 68k LC & Performa about laptop sized drives that can be adapted to talk to old Mac SCSI systems. They might be the best bet, since the ones they are talking about are huge, and shouldn't tax your analog board (PSU).
If you want to use an SSD, I'd recommend looking for a Compact Flash (to IDE) to SCSI card. With one, you can run a smallish (16M - 512M) CF card as the HD for your Mac, and not have to worry about partitioning anything. Also, you could load it up with software from a modern Mac with a USB card reader. I think a lot of us would do it this way if the (very justifiable) price was a little closer to our hobby budgets.
If you don't have expansion cards for your SE/30, then switching chassis won't be necessary. (Network cards and video cards for the SE's PDS don't work with the SE/30 logic board at all, and vice-versa. The gap over the PDS in the chassis for such cards in the SE is smaller than the one in the SE/30, so big SE/30 cards won't clear the SE's little gap.)
Be aware: any time you put the plastic back of an SE on the front an SE/30 (or SE/30 on an SE) they may not fit perfectly. I've had SE/30 backs on SE fronts and the fit was very snug. Getting it back off was a pain. They were made to the same specs, but they were different dies, so there are slight variations.
There's a thread over in 68k LC & Performa about laptop sized drives that can be adapted to talk to old Mac SCSI systems. They might be the best bet, since the ones they are talking about are huge, and shouldn't tax your analog board (PSU).
If you want to use an SSD, I'd recommend looking for a Compact Flash (to IDE) to SCSI card. With one, you can run a smallish (16M - 512M) CF card as the HD for your Mac, and not have to worry about partitioning anything. Also, you could load it up with software from a modern Mac with a USB card reader. I think a lot of us would do it this way if the (very justifiable) price was a little closer to our hobby budgets.