Both of you are doing a great job documenting your solar install. Here is one item others might consider. I bought a manual cable crimper from Amazon. As one of you pointed out, trying to figure out the battery cable length in advance is a challenge. So, I decided on making my own cables as Mike did. Here is the link for the crimper.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
I bought mine a month ago for crimping 1 AWG cables. It works great. It came with a cable cutter which also works great. I can't imaging cutting 1 AWG wire with anything else. I will be revising some of the Keystone 6 AWG wiring and the crimper covers it just fine.
I bought my wire from
http://acdcwire.com/ . It is welding cable and great quality at much lower cost than I foound elsewhere. I calculated my wire length at 5 feet and then ordered 6 feet. I had 3 inches of red left over and no black. So much for my calculations. There are easy wire lengths to miss on your first install such as the lenght needed for coupling a cutoff switch and a fuse. I also ordered the necessary lugs from them as they have all different wire sizes and come in different post sizes..
I also forgot to order some additional wire to connect my two 6 volt batteries. It needs to be upgraded from the No. 6 AWG to 1 AWG.
Keep up the good documentation. I am done but have not updateded my thread. I just finished a 5 day trip and all works well.