AR Auto Invoice Request Set for Projects with PRC:Tie Back Invoices Program Included

Hello All - we did this long  back in 11i we need to do it again.

1. Add "PRC: Tieback Invoices from Receivables" (Project Request)  to Receivable Request Set

2. Create request set in Receivables to include Auto Invoice + Tie Back Program

Questions:

Do we have any implications by adding Project request in AR and making it as part of request set in AR

Only one OU use projects where as multiple OUs use receivables module

Do we have any issues with Org_id derivation ..blah blah blah ....

Appreciate your inputs.