I have a CP1 dual directional coupler kit. Debating whether to make it -20dB or -30dB. If I were to make it for -20dB, could I then add Elecraft step attenuator to extend the range without causing problems at higher wattage (like core saturation with the 20dB toroids). Thanks for any help. Chris VK2LCD K2#3666, K3#685