I wonder if you could try in Q4 adding some small leverage to check the sensitivity of your trading ( way of trading, and psychology/spirituality of the trader ) to leverage ? I wonder if this would mean risking £1000 out of the £2000 profits as capital risked to test the effects of leverage.
All joking aside, NoDoji is right - at a 90% win rate, with 100k+ in capital, you should be trading the currency futures and swinging 50-60 cars a clip. You definitely have enough capital.
Any system that I've seen with that high of a win percentage has a low Win/Loss ratio. In other words, the profits are many, but tiny relative to the losses. It's almost like a fundamental law of auto-trading. If you have a 60% win rate with a 2:1 win/loss, that's a darn good system...IMHO.
I only tried trading the strategy to prove it works on a live account as there are many system that seem to work on demo accounts but then do not migrate on to live accounts. However, I could try your suggestion in Q4 and we can see how it fares in your query.