OK 4 pics..
I couldn't find my modified saw but I did dig up an old spare to I hacked it up for ya
I didn't solder the blade to the handle yet but you'll get the idea.
pic 1 new and old saw
pic 2. remove the blade
pic 3 hack the back brace off with a hack saw and file the burs off.
pic 4 insert the blade backwards and enjoy your new flexi pull saw.