If you configure just for the current need every time, you may find too many complexities and conflicts in the resulting config.
It has been a common experience to get a holistic view. For example in this case, see how OT is to be derived for this empl subgroup or this shift type. Add these conditions in a new T510S rule (copied from an existing one).
In T510S from time, you can use 05:00 to say 15:00.
For 1.35 rate, see in V_512W_B if there are other w/t's with 135%. If so, you may be able to use the same w/t for V_T510S rule. Else copy/create a new w/t called as OT 1.35. You may not need other changes in T512W or posting.
The DWS class may be different for this new requirement.
Test well with data for other OT's as well to ensure they are not impacted.