Just signed up here to comment on this thread and project. I have 2 or 3 A1000 computers, all NTSC models, and at least one of them has a daughterboard inside, maybe they all do. The A1000 has a very fond place in my memories, as it was my first ever computer, and I learned so much during the years that I used and expanded it, before upgrading to an A2000, and the beginning of my Amiga addiction/collection.
You can add me to the list of users who is interested in purchasing at least one Rejuvenator board, either in kit form, or pre-assembled. I also have a bare pcb for the GB1000 motherboard replacement for the A1000 computer, but have not yet even begun to source the parts required to complete that project, and have heard from some users, that it is a difficult project to complete, with translation of the a1k forum threads and messages about that project, from german to english, being just one of the challenges to overcome.
My original A1000 was completely stock when I bought it used some time in 1986, but by the time I purchased my A2000 to use as my primary computer replacing my A1000, I had upgraded it with the 1.5mb Spirit Insider RAM expansion, an Add-IDE hd controller, another device which allowed the first external floppy drive to be recognized as DF0:, instead of DF1:, so I could replace the internal floppy drive with a 3.5" hdd (can't remember the exact name of it), and a Kickstart ROM switcher, with 2 different ROM sockets, allowing the installation of any ROM chips, from 1.2 to 3.1, to be booted from, simply by soft-booting for 5 or more seconds to switch from one ROM chip to the other, plus a jumper, which could be used to allow going backward and booting from a floppy disk. I installed a 105mb 3.5" IDE hdd, which at the time was massive, and one that I thought I would never completely run out of storage room while using (Amiga programs were so small in those days). Although I have not booted that original A1000 for many years, and I have removed some of the components/parts from it, I still have it stored in its original box, protected from damaging sunlight, and waiting to be used once again.
I would love to obtain a brand new Rejuvenator board to install into my A1000, as I am unsure if/when I will be able to complete the assembly of my GB1000 motherboard replacement, and I have at least 1 or 2 other A1000's I can install it into, if/when my GB1000 is finished.