Indeed very interesting project...
But I see only 3 issues:
1.The A1200 keyboard is absent from the design, so we will need to reuse an old one
2.The sticker/badge that the A1200 had will probably be missing too (due to legal issues).
3.The trapdoor (accelerator expansion plastic door) and the faked scsi plastic tab (the small little plastic that covers a port where all connectors are located) are not mentioned.
Anyway, I see it as a good endeavour, and a cool alternative for current users.