so the CH control horns would be fine with dubro heavy duty ball links on the other side? Dubro seems to have 2 different ball links in the Heavy Duty category. Go with the biggest ones?

Servo extensions: make my own? twisted or straight wire? 20 ga?

I also see that there are switches with regulators. I will use a 5 cell nimh pack and I see regulators ranging from 5.2, 5.4, 5.7, 6volts. They say digitals should get less than 6 but they are rated at 6. My rudder servo will go to 7.2v.

Thanks.