There is a list of benefits for this mod at the bottom of the original post (top of this thread). Basically, the mod is fast, easy, cheap, light (good for fast cornering), and makes the X-axis far stiffer than the Z-axis.
Reorganizing the nuts and bolts on the z-axis stage really helped. It’s critical to be able to adjust the v-wheel axle holding force and the eccentric-nut position independently. I’m thinking about switching all the eccentric-nuts to eccentric-spacers, to make both axle-clamping-force and v-wheel position easier to adjust.