Guys, I think all these solutions will work somewhat.!
What I have been thinking is to incorporate a plunger inside the piston tube that partially blocks the oil passages. Then portrusion inside this tube could be used to control the height of the plunger in relation to the oil passages. The lower screw could be used with a nut holding the tube to the outer housing, then changing the space between the bolt head and the nut, will cause the screw to portrude more inside the piston tube, therefore moving the internal plunger somewhat across the oil holes...! What do you think of this idea for an adjustable dampening of the front forks????