Maybe I should explain where I was coming from. I was learning precision and WJ05, and thought I'd play around with my current system by incorporating some ideas. For example, (and these ideas I got from WJ05) I like using 1C for all weak NT hands. Then 1D shows an unbalanced hand. If I suddenly spring the whole Polish Club on my unsuspecting partner, I think that would be unwise. So I was looking to incorporate some ideas from Precision and Polish club in a 2/1 framework, so that we are both comfortable and learning some new stuff at the same time, and can gradually move towards the whole system. Thanks for your replies all.