Hi @Whelm,
+1 for the unprogrammed ATMEGA. LZX sent me two blank ones too, on orders six months apart.
Programming is non-trivial if you haven’t done it before - I hadn’t and it took me a while to work out how to get everything right. And I’ve been a computer programmer since 1986!
But… it is very easy once you get all your ducks in a row.
If you are in the Australian or New Zealand “boonies” and would like me to program one for you, test that it works and then send it to you then please let me know and I’ll be happy to do so - I have a spare ATMEGA chip I bought while getting mine going.
Here’s the thread outlining my experience: Cadet Sync Generator Problem
Stay in touch because I’m here to make sure you don’t have the frustrating experience I did! 
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