Hi Ryan,
As far as 261 mvt are concern you can very much control this via Control cycle, and no need to adjust the negative and positive Quant system will automatically do this please have a look on the below steps
for eg.
Master data one time setup per material : Define the control cycle record using LPK1 and enter the Destination bin as a PSA Bin where u r transferring the stock as part of Step 1, Take the help from PP team to get the Production supply area
Transactional Data
Transfer the stock to PSA bin using BIN to Bin without considering the requirement before the start of the shift
At the line side operator consume the stock against any production order and pass the detail to system user and user post the detail using MIGO into SAP system, here i am trying to post the consumption against the first line item only
Order creation 60003889
Consumption posting
Stock after consumption posting
For Mvt 201/ 551 since system automatically creates TO you can ask the SAP team to remove the Auto to creation flag as shown below
IMG PATH
SPRO------LE---WM---ACTIVITIES----Define Movement type
Remove any value from the field Automatic TO, if it is blank system won't generate TO automatically