Impressed that this all fit on my Up Mini 2 build platform (120x120)!
I did have some problems with printing the mount as the support material ended up stronger than whatever we should call the structure between the to arms. See others have made mentioned or made alternatives for the same reason.
I made a change where the thickness increased a little but more importantly it all has the same cross section viewed from above so less support material. Feel free to take inspiration from it or add it to your files or leave it here.
Thanks for sharing!