Well, I have started my attempt. My plan was to get the 60 cell Atheos conversion with the stock BCM working, and then upgrade to the 72 cell version once the BCM replacer becomes available. I have an old Mike D. Genesis 1 grid charger, which I intended to use to do a balance charge on the battery. I have wired things up to the best of my understanding of the 60 cell Atheos setup and placed the batteries approximately where they will go. The extra 12 cells are just riding along for now. Once I get things working, I was going to fabricate brackets to hold the batteries in place. It has been many years since I've had a working IMA system, (probably since 2014/15) and I have rebuilt my old nimh pack many times. It is entirely possible that some of the 20 year old components in the Junction board have failed, or I damaged something with one of my pack rebuilds, however at this point, I naturally suspect that I have wired up something wrong. I am currently getting a p1568, p1449, and p1445 error. The grid charger is also too intelligent to charge the batteries with whatever way I have incorrectly hooked things up. The next step is to double check my connections I guess, and try to blink out the error codes. Maybe I should remove the grid charger too?