Thanks Caddymumpus.So in the end, i have to kind of "Bounce" the sticks on the hihat...Is there any special way / Suggested way to hold the Hihat Stick while doing this? I tried some really stupid ways of holding it, some worked some didnt.
NOOOOOOO!!!! You DON'T bounce the stick! That's the point!
There's a fine line between "bounce" and "rebound". "Bouncing the stick" is when you use one stroke and get multiple notes out of it. The stick bounces on its own. This is NOT a double-stroke roll, as the second stroke is not an actual stroke, but a bounce. The second stroke will never be as loud as the first stroke, due to the laws of physics, which is why people who do this have very uneven-sounding rolls.
"Rebound" is allowing the stick to bounce upward after playing, so that you don't have to bring the stick back up with your wrists. You then start the next stroke as an actual stroke (not as a bounce of the first stroke). Basically, it's not getting in the way of the stick as it propels back up after a stroke.
If you were to do strokes with one hand, it would be almost like dribbling a basketball. When you throw the ball down, you allow it to come back up to your hand on its own, you "catch" it, control it, and throw it back down (repeat). If you were to liken this analogy to what Tigger in the video is doing, it would be like throwing the ball down and moving your hand down with the ball, pushing down in order to get more quick bounces out of it. You'd have to pick it back up in order to start the process over again, and your dribbling wouldn't be efficient as you'd have to constantly bend over because the "dribbling" turns into smaller bounces that aren't sustainable.
This isn't about double-strokes, but the idea of rebound and not bouncing should be evident in this video:
http://www.drummerworld.com/Videos/jojomayerfingertechnique.html
Hope this helps!