[AVRnj]

This is exactly how my grizzly is designed. I cut stainless and titanium all the tube with no issues.

The coupler can't come apart because the shaft has a locking cap on the bearing side. You can't just simply pull the table off on the left side because the locking cap is compressing everything. This locking cap can be seen in the video.

Now I do understand what you mean about having a bearing mount on the motor side but I have yet to see any Cnc kits that do this, not saying they don't exist, I just haven't seen any.

Are you using a double row AC bearing? If so, I don't see why it wouldn't work, but with a single row, I don't see how the bearing won't get pulled apart by force.