Looks like a nice, well fitted job.

I don't know what the requirements are for the diaper (non-SFI type). Does it need to contain an absorbant mat? Does it need to cover any of the front (between damper and oil pan)?

If it meets the track rules, those oil pan studs to hold the front should make it easier to remove to change the oil. And I assume the starter is outside the diaper, so starter access should be fine.