No modifications needed. Don’t know PLA flex but PETG is similar to ABS but easier to handle.
Please have a look at following table:
https://www.simplify3d.com/support/materials-guide/properties-table/
No modifications needed. Don’t know PLA flex but PETG is similar to ABS but easier to handle.
Please have a look at following table:
https://www.simplify3d.com/support/materials-guide/properties-table/