This angle is called "Ackerman" angle, and makes both rudders aligned to the radiuses the hulls turn at. The inner hull turns at a different radius compared to the outer hull. The same thing is found on cars, to align the front wheels in turns.

Both tillers should have the same angle (but opposite to each other), and it is quite important to have the right angle. The angle is calculated based on the width of your boat. For a 10 foot Tornado, I think it is 6 degrees of bend.

If you find the correct angle (assume the other rudder have the correct angle), you can just build a jig and bend it back carefully. Otherwise, a good aluminium alloy (that can handle seawater) tube should be fine.

Then bend you describe, will affect both your speed and your tacking abilities..