Glad to hear you are making progress.
It does not sound as though you need it, but I have a complete spare tool head assembly for a Mini 1. (I bought it when I was lending my printer to a local elementary school teacher for use in her classroom. They had an issue when they crashed the print head in to the PEI bed. I ordered a spare so they could keep running while the old one was out for repairs.) If you do find yourself in need of one, let me know. I have not checked pricing on these, but would be willing to let it go for a fair “used but working” price.