I'm finishing up an "84 GeeBee profile. It will weigh 15.5lbs.
I've put one Hitec 5945mg on rudder and one on the elevator tonight. A puzzling thing happened just after I hooked up the elevator (kevlar pull pull). I thought I'd put my finger under the elevator then push down on the elevator control on transmitter. In other words I was going to let the elevator control effectively lift up the back of the plane by pushing against my finger.

The kevlar string broke! It broke right where the string is thread through the hole in the 4-40 thread-rod. I must be doing something wrong. I just threaded the kevlar through the hole then tied a knot and CA'd it. I'm worried now.

Kevlar is supposed to be pretty strong isn't it?

How do I do this properly so the kevlar doesn't break in air?