I took a look at this beautiful barred spiral at the end of my observing run this new moon, the last object of March 25th night in western Arizona. Here's what I logged:

"Fantastic barred spiral, perhaps a northern exemplar of the class. The structure is apparent even at low power. Round suddenly brighter core, two prominent arms emerge from the bar."

I also made the following rough sketch:
NGC5248.jpg

For some reason, I saw the western arm thicken at the junction with the bar, as I have sketched it. I was also unable to perfectly identify which feature on the image the knot I was seeing corresponded to. Reading Steve's 48" report makes me believe it must be the region composed of [HK 83] 5/6, which he considered the brightest in the 48".