5:1 sure you sacrifice speed for power, but why? You can use larger NEMA 17’s up to 96oz/in I believe, or even strap on some NEMA 23’s Geared steppers tend to be very expensive.
Have you built one?
Were the steppers not strong enough?
Was it not rigid enough to support your cutting tool, it is not really significantly larger or heavier than the Dewalt that is being commonly used?
I ask these questions so I can use the input for version 2. There really hasn’t been any complaining from anyone that has built one is why I ask. Sure we all want more rigid but for every decision there are compromises.