Are you using the 4231 or was it just a test? Is it really that good?
I have a save with a team built around a 4231, currently using xper awar[H], I was thinking of trying this or perhaps TFF reaver V6...
I have a Cardiff and QPR save where I use to test play all the tactics I find interesting. I will try a tactic about 10-15 games and if it is good I will continue the save for one season. All I can tell you is that 4231 is the best 4231 I have tried so far.