I have never seen a birdie king 1 set. Not even online. Little to no documentation either. I have bought a few. One was just pile of junk, one a workibg bk2, one an incomplete bk2. Were all the bk1 sets converted to bk2 and bk3 and that is why I can't find one? Do you know if it was just a rom swap? I have a few bk2 and bk3 sets. I am on vacation, so it will take me a bit to check out the roms on them. Thanks for your help. Wife and I Play bk2 all the time. Would love to get a hold of a bk1.