BPM: send 2 different files to same folder and then call RFC

Hi Gurus,

I need the design of this BPM:

2 files are pulled from an FTP site, and both placed in an SAP folder (no mapping required). Once both files are placed, then I will need to call an RFC.

I think in BPM for this:

2 receiver steps (for both files) --> 2 sender steps (for both files) --> 1 transformation (for RFC mapping) --> 1 sender (for RFC)

Am I ok with this?

The only concern is that as the first receiver step starts the process, then for a mandatory reason I don't know I need a correlation on the second. Can I avoid this? how?