hi guys,
The kingston simms listed are the "thin double-sided" ones as mentioned above, and fit ok(they do snap into place on my blizzard albeit barely), the HP simms are a bit fatter but still fit using the elastic band method above.
I have been using the elastic band method for years on 2 of my amigas with no issues. I know it looks a bit suspect, but there are no problems caused by it.
If you own a SCSI module for your blizzard 1230, then either of the simms listed will fit straight in.
And finally, if you are lucky enough to own a blizzard PPC, both types of simms should fit straight in with no problem!
Cheers