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Here is a little design that makes me less anxious around all these kWhs Happy to share stl file, takes about 10min to 3d print one. Depending on your printing skills you might have to run M6 tap before using... I did ? https://www.thingiverse.com/thing:5987594 - STL file here

To late to change things, but I welcome any suggestions anyway! Dimensions are approximately 32"x20"x15" basically should fit 8x2 cells + the bms, contactor and esp8266 for extra temp monitoring etc 4" bottom 2.5"walls and lid. Hardie backer board for leave-in-form, concrete filler. Liquid tight...

Here is a fragment from the manual. I have a couple of guesses about this, but can't connect power sources together based on a hunch :). Does anyone understand, better yet use this? Thank you

Received the batteries about 2 weeks ago and only got the tester 2 days ago. Out of 16 cells so far I've managed to test 3 and 4th is still discharging. While hooking them up to the tester 4 cells lost 1 stud each. They just pop off like it's all fun and games. I am using a basic torque wrench...

I have received 17 cells from 18650BatteryStore. These are EVE LF304. So far, I see something under the blue plastic on 3 of them. See pictures. Is this a cause for concern? Some small leak definitely occurred at some point.