Wasn't designed for Amiga, it had been sat in a local store for months - I offered them £5 for it (RRP at the time was £20). It slots in nicely, looks like it was made to measure, and being full length pushes the air the right way round the case ... could make up a 'skirt' for it if you needed EXTREME cooling!
Make sure you get an ISA version, and not a PCI one BTW ;-)