Greetings p2poolers,
I'm the owner of the "1Hinen" address. I began renting hashpower to mine on p2pool about a month ago and noticed the smaller block sizes, and came across the discussion here after some Googling on the subject.
@jtoomim, I have switched my node to your fork. I just finished downloading the sharechain and it looks like everything is working well. You can expect anywhere from 0-10Ph of rented hashpower from me depending on rental prices.
Please let me know if I can do anything else to help you test your fork (or if I'm doing anything that's not helpful). Thank you for your work on this. Looking forward to finding a fat 1MB block with you.

--Darren
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Node: whortonda.noip.me
Worker port: 3000
P2P port: 9333
Connected to: ml.toom.im:9333
To connect to me: run_p2pool.py -n whortonda.noip.me:9333
CPU: Core i7-6800K @ 3.4GHz
RAM: 32GB
Pipe: 100m/20m cable
Using: Python 2.7 / Ubuntu 16.04 LTS
I am using a non-standard miner port to avoid conflict with litecoind.
Anyone is welcome to mine to my node, but I can't guarantee 100% stability.