How much should my euro lights move up and down?

[DieselHead]

Euro headlight owners,
I recently connected one of my vacuum euro lights to the vacuum system but noticed that the beams don't really move all that much when the switch is played with. With my car pointed at a wall, I can see the light move up and down just a few inches, but it is hardly noticeable when the light is actually aimed at the road. So, how dramatic an effect should the vacuum adjustment have? Do I have my light aimed wrong or something? Is there not enough vacuum getting to the lights? The vacuum source is the front nipple on the main vacuum line going from the vacuum pump to the brake booster. The vacuum switch is located where the speaker fader used to be. This should give you an idea of how much vacuum tubing the headlight system is using. All in all, were pretty disappointing. I hope there's something wrong that I can fix.

Alex