I became 99.9% fluent by actively disclosing my stutter. I now can say everything I want to, in the way I want to, and when I want to. There's a very good chance that your technique will work for a period of time, and then will become a much heavier load on your mental processing. There will always be words that you CANNOT come up with alternatives for (names, town names, addresses, etc). The longer you convince yourself that hiding your stutter makes it better, the more embedded it becomes, and you may develop secondary behaviors. You became a COVERT stutterer. That is, objectively, a worse position to be in. If this is preferable for you, then go ahead. But I'm trying to inform other people that this path eventually leads to more problems.