Question about spindles vs routers

Ok, I know from searching that this is not an uncommon discussion, so sorry for that. But none of the 20 or 30+ threads I have read this morning really answer my questions. And unfortunately there is a lot of differentiating information in them as well. I don't know if posting will help, but I figured it was worth a try.

I'm currently building a home DIY CNC machine. I've got all the hardware, frame of the machine and such pegged down. It will be made of mostly aluminum so I'm not...

Question about spindles vs routers