Congrats Juergen - that's great going particularly 4W/DJ2EH on 30m. I find working the lower bands from home on my vertical antennas quite a challenge as I've a very high noise level (about S5 to S7). I've only worked 40 countries on 80m and at least half of those have been with 100 Watts!
Good luck with your QRPP, it should be an interesting test and a lot of fun too.