Can you follow up further?
Antminer-S9i-all-201811071119-autofreq-user-Update2UBI-NF.tar.gz ..... I am using this one
Antminer-S9i-xilinx-201811301418-autofreq-user-Update2UBI-NF.tar.gz ........ so how does this one do?
If I'm reading bitmains details the 20181130 firmware correctly, hash rate and power efficiency are both lowered.
I'm getting the same numbers as you posted from the 20181107 firmware +/- depending on fan speed/ambient temps. I'm looking at
which direction to go when season changes next: flash bitmains firmware when needed or try braiins.
If braiins is better all around, Have you done one of your video's on braiins?