Indeed I've done it, though I had the holy grail of all strategies and could do no wrong so scalled and kept scaling... then 24Aug15 came along and Puff, 2 years of profits and more gone in 20 minutes. You are either a newbie to trading still in the beginner's luck phase or just posting to boast because no-one can be consistent in all market conditions, if you think you are, then you haven't been in the game long enough to experience all market conditions.
Scaling can work until it doesn't, a black swan happens and markets turn on a dime, if you are in heavy, you loose heavy. 24Aug15 tough me to deploy only 10% of the capital, if your capital is $400k then deploy $40k but do it with diversification rather than just scaling. Scale only the positions that have a better risk/reward ration, keep the others small but also enter into different instruments simultaneously, and, always have some positions that inversely collerate with the main market.
As said, your post is just a boast exposing your wreckless inexperience, if you intend to become a successful trader then pay attention to above said.