Not sure how slick the cooling system was/is . . .
Color that VERY
slick, like all Radius Products. After all, the company was founded by the very best of the engineers from the Macintosh Team.http://www.fundinguniverse.com/company-histories/radius-inc-history/http://en.wikipedia.org/wiki/Radius_%28computer%29
. . . it's a bit hackish as it seems that many addons were for the Macs prior to the SE.
That upgrades were available at all took the likes of Burrell Smith to create those product of the year "hackish upgrades."
< mode = skip to conclusion if you think the 128k was in any way a usable, viable product right out of the box >
The Jobsian "Closed, perfect just the way he wanted it box,
and don't you dare
touch it or you'll void the warranty" flavor of "Designer Wannabe Dementia" finally ended when he got the boot and the SE and Mac II were released with built-in upgrade slots and cooing/power budgets approaching sanity. Jobs was certainly a genius, but a real engineer or designer he wasn't, despite that, he did simply amazing things over the course of his all too short lifetime. Three generations of self-destructing MoBo Oven Digital Appliances notwithstanding, two generations if you count the 512k/800k Floppy as the first and relegate the 128k to the public Beta Hardware Release that it really was, the Mac was his baby and turned out well as a grownup, but, oh that nasty adolescence! The story of Radius curiously mirrors the fortunes of Apple during that period of adolescence and The Steve's exile.
Desktop Publishing pulled the punch drunk Mac off its knees at the ropes and back into the ring for another chance. Radius products played a VERY large role in making DTP workable on a platform that was wholly unsuitable in terms of hardware, but visionary and perfect for the task in terms of its Graphical User Interface, WYSIWYG, albeit miniscule, Display and LaserWriter proofing for LinoTronic output.
< jump back in here to test the above question about product viability >
Pull the 5V you need to run the fan off the AB or the Floppy Connector on the MoBo to do a temperature test of the Plus with the fan running and air dam in place and then test it without. Dollars to doughnuts you'll see a marked increase of ambient temperature inside the case without the fan and air dam.