Thank you Wesley,
I appreciate the input.
I worked on a similar machine back in the dark ages (DanCad, parallel port connected drivers & ACME drives) and we went through several design revisions to accommodate larger and larger routers until we found one with enough juice to have decent cutting performance.
I had initially gotten the idea that the 660 only came with a 1/8″ collett. I just looked on Amazon and see one that has both 1/8 & 1/4.
I am beginning to warm up to the idea of the 660. I would still love to hear from those running the 611 and where I might find the mount for the 660?