I guess what is "fast" though, I suppose it is not impossible for this particular design(that looks like it would wiggle/swivel?) due to the horizontal moving m

I guess what is "fast" though, I suppose it is not impossible for this particular design(that looks like it would wiggle/swivel?) due to the horizontal moving main joints. But I have not done calculations to prove that(which would be faster horizontal or vertical swing) edit: which is interesting arguable horizontal join/swing design is less work