I will just copy paste myself from my other thread and add some more info, because I think that you already know how to work with spintax articles.
Let's say that you have an article about van insurance, and you want to make it a quality 100% spintax article, then first you should write one sentence that has three parts. Like this:
The cost of insuring a van is much more than that for a car, and if the van insurance done is for a corporate vehicle, then the cost of the same would be more than the insurance cost for a personal one.
As you can see, the sentence has three parts, and now you have to rewrite the whole sentence a few times to get content for a spintax ,but we will rewrite it only once so you can get the hang out of it. You should have something like this:
The price for insuring a car is far less when compared to that of a van, moreover the cost for a van insurance for light trucks used for business purposes, are higher in comparison to the insurance for the same when used for personal purposes.
After that you have to spintax each sentence individually to get a sentence spun article, and get something like this:
{The cost of insuring a van is much more than that for a car|The price for insuring a car is far less when compared to that of a van}, {and if the van insurance done is for a corporate vehicle|moreover the cost for a van insurance for light trucks used for business purposes}, {then the cost of the same would be more than the insurance cost for a personal one|are higher in comparison to the insurance for the same when used for personal purposes}.
Then, I would advise that you spin it once more, but on word base. You can use lot's of different tools for this, or do it manually.
{The {cost|price} of insuring a van is {more|a lot more|much more|far more} than that {to your|for your|for a} car|The {cost|price} for insuring a car is far {less|much less} {once|as soon as|when|after} compared to that {of a|of the} van}, {and if the van insurance done is {to your|for your|for a} corporate vehicle|moreover the {cost|price} {to your|for your|for a} van insurance for light trucks {used|utilized|employed|applied} for {company|organization|firm|business|corporation} purposes}, {then the {cost|price} {of the|from the|with the|on the} {same|exact same} would be {over|more than} the insurance {cost|price} {to your|for your|for a} {own|personal|very own|individual} one|are {greater|higher} in comparison {to the|towards the|for the|on the|towards} insurance {for your|for the|to your} {same|exact same} {as soon as|when|after} {used|utilized|employed|applied} for {own|personal|very own|individual} purposes}.
And that's it. But, the thing is, I used only two sentences with three parts each, just so I don't complicate it too much for you. You can always make it better with adding four, five, six sentences with three, four or five parts - and each part spintaxed on sentence and word level.
When I usually make spintax articles for my projects, I usually combine 10 sentences with five parts each. I also combine at least 20 keywords in it and at least five different URL's to my money site and around 50 outer links to youtube/facebook etc. The best thing in the whole story is that they are 100% readable and also 100% unique.
But keep in mind that articles like this make sense when you are posting on bigger blog networks or, as you implied, on 600 web 2.0 sites.