I know what you mean about the straight arm thing feeling natural. I felt the same way, until I tried bending my arm, like my bow tech advised. I shortened my draw to where I felt the most comfortable. My groups really tightened up after that! I had to switch from a single spot target to a 5 spot target, because I kept messing up my arrows. One Robin Hood...holy cow!
Two Robin Hoods...cool!
Three Robin Hoods...now I'm getting mad!!
I just lost 20 bucks in arrows!
lol...give the bent arm a try. Have your bow tech shorten your draw an inch or so and see how that feels. Believe it or not, most people are overdrawn. When I first started I was at 29 inches!! Yikes!! I am now at 28 1/2 inches which is much better for me. I'm more stable. The half inch really made a diffeerence.