CPM-SDSK-3421S-ELN motor is selected.

But by mistake I ordered the TBI 1620 model.
I knew later, but the lead is said to be 20mm

Should I change back to the TBI 1605 model?
I mostly want to do precision processing with aluminum

Please comment on the ball screw change.

I bought a C5 class 350mm product.( SFA R 1620A1 D G C5 -559L )
I hope there is no big problem.