Hi Oki,
Yes, if you don't mind, I would like the files as is. Just let me know where to download.

Till I read your post I never heard of the Attiny85, that is why I choose for the Arduino....
So, I will test with the Arduino, it is already on it's way. But probably for the real set-up, I will use the Attiniy85. I should be able to stay somewhere in the mountains for a long time (the longer the better).

Good choice for the Yongnuo triggers I think. saves you a lot of work which is sometimes the better option.

thanks for your answers anyway, very happy with it.