Hello everyone
This tool is created for people who own a scanner with a document feeder which isn't able to scan duplex (both sides of a sheet in one scan).
Note: This tool runs on all computer-platforms! :)
Step by Step:
1. Scan all sheets frontsided to one PDF-file.
2. Without changing the sort of the sheets, turn the whole bunch of sheets and scan it again (all the backsides).