So I went ahead and looked for the straightest ERC in my yard this am to see what possibilities for bow wood exist here.
Not having any trees backed up to others/canyon walls, I settled on this 2 trunker on the roadside:
Sorry, did not think to take photo before cutting...
After felling, I measured 90" to the first branch on one side, then cut there:
It is 5" diameter at base, and 4.5" at 90" up:
Here are the rings at the top and bottom of this log (bottom not a straight cut):