search for radio trigger mods and it has pics for the dx3.the dx3r was a little trickier because i had to take off the lcd protector,but all in all they where both pretty simple,just some longer screws and some fuel line.
with all the engineering in rc,it seems absurd to me that the manufacturers dont even try to match the trigger throw to the arc of your finger.maybe they think it would be too weird.your finger moves in an arc,but they mount the trigger on a tangeant?
to each their own