amma -
The block looks great (beautiful)
I love the colors you chose
Occasionally my machine has sewed "bonkers" too - and I look at the stitches and debate with myself - "will it hold - will it not hold"
I know you would not have been satisfied with the block if you had left it "as is."
Thanks for sharing the reminder to clean out the areas on occasion and about the other "comparatively easy fixes" - the only two that you didn't mention were about the top tension (wandered off on my Singer 237) and the bobbin tension.
Will you also post a picture of the back of it? How did you deal with all those seams that come together in the center of it?
The top stitching/embellishment makes the blocks look very elegant.