Hotend Mount/Holder X axis upgrade?

Wondering if anyone has attempted to redesign the x axis mounts to resist flex during speed.
needle bearings would be great too.

Noticed a good amount of flex on the hot end side, so I placed a piece of scrap abs in the gap behind the nema17. Before the filler scrap, the right side was flex ... afterwards ... the left is now flexing.

There's a nice right up on upgrading the plastic pulley in the left carrige to a g2 toothed-all-metal pulley with bearings installed.