CRM integration possibility with gATP through ECC

Hey Gurus,

We would like to setup the integration between CRM (731), ECC (606) and gATP.

But I will NOT setup gATP integration directly with CRM. But rather CRM sales order replicated in ECC, ECC should perform the ATP check by calling gATP. Afterwards the ECC sales order replicates back to CRM. Then CRM get the ATP result from gATP indirectly.

And it should not requires performing ATP check manually in VA02 after CRM order replicates to ECC.

Has anyone experience such indirect integration between CRM and APO/gATP?

Thanks,

Br,

Ying