You can go with the “steel spar” mod: X-Axis Stiffening Modification - #9 by TroyGrela
or the
“30-minute x-axis mod”: A 30 minute x-axis mod to reduce chatter
I did the steel spar mod, but both mods have positive reviews, so it’s more up to what you prefer. If I had to do it over again, I would try to 30-minute mod first and see how it goes.