Thanks for the share.
Sounds very similar (or a tad better) to my results. I'm only mining with 57 TB. That used to get a hit every 2 to 3 days... now it's about 2 to 3 per month! Lol
I have noticed the difficulty used to very between 20,000 to 45,000... now it's hovering in the 1xx,xxx range most of the time.
I thought, perhaps, I was doing something wrong... now I see your results with DOUBLE my power, I'm ok. It just looks like, as usual, the 'free lunch' ended 5 minutes before I got in! Lol
No worries... going to let them just run in the corner. Bonus money once in a while.