To change to 4PX or to switch
 

Last year, having come back to electric onroad cars after over a decade of void, I got myself a Futaba 4PKSR from a friend's recommendation.

Now, one year later, with the 4PX is coming, having just sold my 4PKSR tranny, at this conjecture, just want to pick the brains of those who tried Sanwa/Airtronics M12, KO EX1 and 4PKSR, which one is more responsive?

Back over a decade ago when I was into gas onroad (the PCM days), I used Sanwa because I tried Futaba and KO and I felt its the most responsive amongst the three. Is it still true?

I'm in the same position. I own the 4pks and feel it's time for a change, I'm really looking at the m12. I'm also considering that since I have 5 cars I need 5 receivers which brings my cost upto the $900 area. I think the 4px is nice but since it's not faster I'm leaning towards the m12.

When I bought the 4PKSR I thought about the M12 too, but my friend said Sanwa mini servos for 12 scale might have problems using Futaba servo and Sanwa's own small servos are not good....

The only reservation of me getting M12 is that I am sure with the 4PX Sanwa would have a color screen tranny in the pipeline...given the M12 debut in 2012, might just be an update with a color screen next year