This rather modest accelerator has been overlooked by many but it is great - cheap, highly compatible, has an RTC, gives a taste of faster CPU and can facilitate an FPU, and it keeps with the tradition of Amiga not needing much RAM - you learn to live within the 2MB CHIP / 4MB FAST memory.
This one I have soldered in a 40MHz crystal for the FPU, I have also replaced the 32.768KHz RTC oscillator and the VL2020 rechargeable battery. Finally added the Freescale MC68882 @ 40MHz, not before giving the board and all the contacts a good clean.
Runs very stable indeed. For HW Pr0n, please check out these clean, high resolution pictures.:
http://amiga600.net/blizzard1220/
Mike