Hi, which transmitter and receivers do you use. I was looking at the ko propo EX-5 Ur which has a lot of features and is 8.0ms response time it is a great deal with 1 KR210S for 100e posted - new or a sanwa mx-3x for 100e used which is better sanwa is 5.5 ms but does it really matter that slight of a difference?i am using savox 1258 and savox 0252