Extended z on ender 3 v2. Wavy

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I have a ender 3 v2 that I extended the z axis on. Now I get wavyness on the X axis only even if I print real slow. Any help would be appreciated. Only other mod is a bl touch v2 that works great.

As you can see it prints perfectly until it hits about the stock hight of the original z axis.... I actually got this without modding it at the same starting location when printing tall prints. So the z v slots and the acme rods were replaced and I also have duel z axis motor mods ifrogot to add above.