I was actually making my own legendary grinder! But it has some of the problems I personally think is a deal breaker
- No easy replacement for the assembler. You need to move everything if you want to put an electromagnetic lab
- not modular. Low quality assembly often get clogged while high quality is waiting for stuff, so you need to be able to add more low quality assemblies than high quality.
- No easy way to set the buffer. 4 stacks is way too generous, and you way want to lower the buffer for low qualities