Is there any basic reason to define 25 KG per SUT in the WM2 view.
As i can see that you are able to store 200 KG per pallet (and your removal requirement is also for the full pallet) then let system create only one SU. i believe in this case you need to correct your master data rather then looking for alternate for QUANT (in standard SAP there is no solution to assign the same Quant number to 8 different Storage Unit)