finished, images too big and I didn't want to fight with resizing
for everyone in the future
here is my advice
please note that I am NOT an expert, but I'll explain my reasoning
first, this is a box of leather you got cheap, if you screw it up trimming to store, just go get more
second, I underestimated the panel sizes I mentioned, this [package is a fairly good deal, but caveat emptor
third, any place that where the leather narrows, cut there, look for places where the narrow bits are already damaging your leather due to stress loads, this will help you get them into somewhat more manageable pieces. you might sacrifice some bits to make larger panels at the cost of scavenging stuff that could make straps
https://imgur.com/a/PXnMJzz