Hi Frans,
Thanks for your reply.
Actually there are many reasons why I don't want to buy one. I like trying to do things like that instead of buying one, it's much more fun, then I have all the components/equipment to make the PCB. So I want to give it a try. If it doesn't work, I'll buy one ($40 is a lot compared to $0 ;-)
If I did understand well, this forum is mainly (only?) talking about firmware upgrade, not what I'm trying to find, right..?