Success - I’ve managed to open her up without using a torx screwdriver! A 50x3 mm flat blade does the job nicely.

Special thanks go to

http://home24.inet.tele.dk/ccadams/se/torx.html

and to JRL for the “helpful hints”

Now I need to get to the hard drive. There are two “chassis”, one mounted above the other, on the LHS looking from the back. The top one contains a small square box but it has no apparent witing on it and looks too small to be the drive. Should I remove the top chassis to get to the drive?

johnboy

PS in reply to JRL’s

“I'd say you should keep your Macintosh SE because you may regret selling later”

I’m already regretting it, but compete lack of space in our new house forces the decision ;(