I am glad you like it, even better if it helps you with your own work. Your nostalgic picture was a lovely piece itself.
Part of the detail was due to “experience”. Not real blender experience, but something more practical: roofing. I roofed for a summer and got to see house shingles all day, almost everyday, for a summer. You learn that your shingles must overlap, otherwise water will come through. The owner will be unhappy due to the water damage that can happen and the boss will be unhappy because of the complaints he will get. Shingles themselves were of different sizes of patterns on a shingle sheet which gave both a regular and an irregular pattern on the roof top pleasing to the eye. Some of that stuck, like the nails to your shoe if you stepped on them. Ouch.
The other help was NP5 telling me to pay a little more attention to detail: look at reference pictures.
Unless you are talking about NP5’s pump, in which case- disregard the rest and I will agree with you that his pump is really good.