Hi Frommi,
Thats a concentrated portfolio you have. What percentage of cash do you hold in the portfolio? Like Patmo mentioned. How would you react to a large draw down on 2 or 3 of your holdings?
1% cash, i am still working so i don`t see a reason to hold a larger cash stake (but the yearly contributions are smaller than 10% now). In case of a drawdown i do nothing as long as the businesses progress as i expect them to, what else should i do? Sell?

What works for Michael Bury, Mohnish Pabrai, or even Warren Buffetts early partnership days might not work as well for an individual.
I am a cloner and i clone everything that works. The math says more diversification doesn`t reduce risk significantly but reduces returns. There are so many threads in this forum where you can find evidence for this. Most people talk about diversification and the 100 businesses they have in their portfolio but then overlook that most of these are correlated anyway.
In the end everybody has to do what works for them and since i noticed that 70-80% of the stocks i buy go up 2-4 weeks after i bought, i thought i can reduce the number of my holdings. Thats the advantage of being a good market timer, though its of course not necessary to be one when you are a good value investor.