138069 Article Spinning

I have two 400 word articles that need to be spun 15 times each. In other words I want 15 different versions of the same article. Each one must be more than 40% different when checked against each other. This job must be done manually not using a piece of software and all of the 15 versions must read correctly. I will ask for a test run of 3 spins of one article before going ahead with entire project. Any questions please ask. David