I made some more simple parts that will work on both the Nexus and Aeon Pro X. The Safety does have a thin bottom that can be glued to the shell. It can be printed with a brim, trimmed off and glued. Either way works. The spacers can push the Nexus beyond 250, but on average it got around 230. Again, all parts work with BOTH the Nexus and Aeon.

V2 Update - Tweaked dimensions for spacers as they were tight using PLA