"they kill my production. "
Yes - my average is all over the place. Poping into the top 20 now and again only to decend into the pits of hades with several machines tied up for 10+ days on WUs.
It would seem that the more machines the more stable ones average would be - and it actually seemed to be for a week or so - but with the different types of WUs and loosing an internet connection plus multiple power failures and that stability vanished.
It's interesting to watch and try to stay detached.
Oh yea, congrats on the breakthrough of 20,000 points!