How are you recording the trades for the taxman?I just realized I didn't address this part of your last question, and probably left you with the wrong impression.
I will use different stops, but never lower than the level that was used to determine the initial entry size. I could imagine possible scenarios where I might move a stop up and then consider backing it off later, but never past the original level.
I scale in and out of trades and keep a running record of the average cost for tax reasons. Excel spreadsheet thats a pain in the ass but at least I have a paper trail if I get audited.