I changed my jet setup a while ago and am very happy with it. I upped my 4-jet wand to '02s. giving a total flow rate of '08
I also downed my 2-jet to '02s as well, giving total flow of '04
This means I can run the pressure at 150-250 with the 4-jet wand (12" westpac/2" tube) and still achieve a very good flush without forcing water hard into the carpet. It works best on wool, or any carpet that isn't heavily soiled. Today I used it on a 100% wool carpet and with doors/windows open plus an air mover in the room it was touch dry before I left.
The twin jet with 2x '02 jets is fantastic for mingers, used at 400-500psi. It doesn't use any more water than using '03 jets in the wand at lower pressures but gives unbelievable results and still very good drying times. It's a 1.5" porty wand (12" wide PMF-802) and I often think I should get a similar one with 2" tubing but it's not really a problem so spend my equipment budget on other things instead!