The NGC253 images are awesome Paul, some really nice detail in there and nice bright core.
As a side-note, personally, the frame doesn't appeal to me, it's a bit of a distraction from this fine image.
M31 looks very good too, very bright core.
Maybe if you can adjust the core slightly to tone down the brightness it may reveal some extra detail.
That Canon 135mm L is a real shinning performer (as is the side of your car
)
What f-stop did you use?
Well done Sir !!!