Ive been developing BINman a little more and some others have let me know they are using it too which is nice.
Here is an updated version (v1.6)
The layout has changed a bit to remove any clutter that would be caused by adding new features. Its now all operated by the menu bar.
It can now:
>split a file in to 2, 4 or 8 smaller files. These files are named “file#” where # is the sequential number of files generated.
>swap the upper and lower half of a file
>combine 2 files together