Steering coupler question

I have to tell you guys that I believe that NOT ONLY the angle is an issue. You don't think there's some flex between the K and the body/ column on a hard bump, etc? The factory coupler SLIDES quite a ways, and even other (brand) cars, and vans, which use the flat washer "rag" coupler will move, say, + / - 1/4" or so with no problem.

These U joint setups give you ZERO axial (in / out) movement, and may damage the column, or "work" the setscrews loose and wear the box spines.