No, I threw it together after reading your post. It assumes a +3R target, a 25% scratch rate, 22.5% win rate and a 52.5% stop loss hit. With those assumptions it shows that you would have a + expectancy of 0.15 or in other words for each $ invested you would get $1.15 (on avg over many repetitions).
I think its good to see just how 'wrong' you can be and still make money with a good tight entry. Obviously if you enter into trends, that will improve your results a lot by giving you high +R.
I tend to go along with what the market is telling me and giving me, rather than demand a +3R. Sometimes you should be happy with a +1R and sometimes it will give you a +7R (albeit rare!).
Anyway, lets get back to talking about specific dummy trades.