get rid of the row crop,,,go to pans,,,we have used them for around 25yrs,,,no trouble at all,,,and get lucke pans, they are about the best you can get,,,just email them via the attachements section on here and they will get you a contactn,,,you should try to get a hold of a good used rigid head and mount the pans permanantly on there,,,you can find old rigid heads around for not too much money,,and if you are going to grow flowers for a number of yrs,,,make the investment,,its worth it.