Pete... Usually, the servo will have more travel then may be needed.. If so move
in on the servo arm hole, and out on the control linkage hole for mim. travel, then
you need to adjust your EPA= end point adjustment on the transmitter you should have
two adjustments one for each end of the servo throw.. I try to adjust both for as close
to the same for both ends. So I usually start with a centered servo/trans etc., and
center what ever control I'm adjusting and without hooking the control rod, I go
through the range of travel, say full open with the radio, then I man. move the
control end to full open and move my control rod to match the holes, and do the
same on the closed side and make my adjustments, before hooking the rod and
making final adjustments.. It sounds like a lot, but it's not. It works for me...

You could also go with different servo arms etc., which is usually in a bag that comes
with the servos/trans.... To help get what ever travel you may need... Good luck