Cross Company STO with Commom WBS

Dear All,

I have explored the solution regarding intercompany STO with project stock (special stock Q) and activated the business function “LOG_MM_SIT” which allows goods issue from replenishment delivery with new movement type 681 (special stock Q) but now the challenge which I am facing is that this functionality works only when the WBS (sales & purchase)  is common in both company codes

I have referred to below thread but didn't got answer to my query of having common WBS between two company codes.

http://scn.sap.com/thread/3406017

Also referred to SAP Note: 1596031 but still no help, kindly suggest the right solution.

Please find the below process flow

Thanks

SS