What rotors work well in USTowers' TX-455? The T2X will not fit and it appears a Ham IV (8" dia) will not make it in the 7 1/8" ID of the top section. Ants will be at least a tribander (e.g., Explorer 14, KT34M2 or SteppIR 3L) plus 3L WARC. Thanks, Bill K1CN