I have been running mrt transponders for 3 years now.
I have had 2 set up to the same custom number that was first sent out when i ordered from mrt.
So far i have not had to change to the other 20 numbers.
I have raced at national level in Micro, and club level in 1/12th circuit and 1/8 Rallyx.
They have never missed a lap and for the price are great little units.
My friend borrowed one once for his 1/10th and we changed it to one 20 numbers for him and it was so easy to do.
Plus the guy at mrt is more than willing to offer phone surport on his products.
