Hi, the under bonnet adjusters work for both high & low beams I think-they are the white plastic hex heads behind the lights, one is up/down, the other left/right.
Rob
No way to adjust high beams, just have to accept that half the light is above the horizon.
I'm assuming the dipper is just a shutter that cuts off half the light.
The adjuster just raises or lower the body of the lamp?
Good in tunnels I suppose.