Pictures are always good. Please post! Single biggest time sink for me was the complication of more than 1 battery box. I don’t know LR architectures, but if you can consolidate to only 2 instead of 3 you’ll appreciate it.

Not very elegant, but you can use the conversion / adaptors that Leaf owners use. Not cheap though. There’s a few versions around. I know in the UK, there’s a Leaf forum that has had good results with the EV Boy type.