Hi Alan,
I also have a Synth 34. I'm no expert as I have only started flying before Christmas. However, I always take off with the trimmers at 0. Once I get to my cruising height, I open the trimmers out. Normally to the 14-15 setting. I always set them back to zero on landings.
I also get some torque steer, which rightly or wrongly I correct with the trimmers. In most cases my right trimmer is set to 15 and the left is at 10. (Can anyone advise on this? I fly a Bailey 175)
On take offs, I also find I have to apply a small amount of brake to unstick off the ground and then slowly release the brakes as I climb.
I haven't flown with the speed bar yet.
I hope this helps.
Chris