I don't know about any publicly available demo. My opinion is the following: because the aux module with simple OS command execution is OS independent I would like to correct this module based on your notes and submit that in this way as it is (it will be ready in one day).
On the other hand during the following days I will create an exploit module that will be able to execute payloads but only for windows, because in my environment I have only windows targets and I can perform tests only on them.