If you're hung up on the particulars of HOW (or how much) to spin an article, here's the simple three-step dance I use in all my article spinning (Note: I uses MAR):

1) Paragraph replacement. I start here cos it's the easiest. Wholesale rewrite paragraphs to give me 3 variants of each paragraph in my article. Takes about five minutes.

2) Synonym replacement. Go thru the paragraphs and variants and pull out individual words. Find other words that mean the same thing and drop them in. Note that in some cases, you'll need to do a phrase replacement to get the grammar correct...no biggie. Takes about another 5 minutes (don't use "all instances!" button, or whatever it's called - can totally mess up your day

3) adjective replacement - if you're writing about an awesome new widget, it can be described as awesome, fantastic, wonderful, incredible, absotivelystupendously excellent, gottahaveitnowwondermous, etc, etc.... Just drop in a few variants to help describe whatever you're writing about (again, being mindful that at times you'll need to edit a phrase, rather than just a single word, in order to make the grammar work), and that's it! Another five minutes spent here.

For grins, if you have any humorous elements in place, take a moment to vary those as well (maybe another five mins, if you have any).....

And in fifteen to twenty minutes tops, you've got a {most excellent|WONDERFUL|fabulous|terriffic, well-spun|fabulously well-spun|fantastically crafted} article base that will spin out many unique (or unique-ish) variants, if you're worried that one day, big G will go hunting for duplicate content.