Yes, there's a few things that I am curious about:Interesting @rayhan , tell little bit more how you've made this dish. I would say, that skewing of the dish is necessary to get maximum performance.
1) how do you make the dish reflective? Did you embed a mesh (CM/Prodelin style), or is there metal partiles or paint in one of the layers (SMW style)?
2) at what LNB positions do you get reception? At the ends, or in the middle of dish?
3) how did you calculate the torus-shape, and is the dish parabolic or circular in the vertical plane?
You can skew the dish by skewing the plate the mounting triped is screwed unto.
while not ideal, you can, for experimentation at least, put concrete blocks or similar under two part of the wooden plate, and thereby skew the dish.
Remember, the dish needs at the center needs to be skewed to be aligned with the sat arc across the sky.
Edit: Probaly the best approach is very similar to to find the "middle sat" for the dish, (which is somewhere in the middle of the 40 degree span you are looking for), and then align the left or right hand side of the plate with than direction. By tilting the plate either left or right, you can skew the dish, so that it's aligned with the geostationary arc. This would be clearer with a drawing, and I may make one for you if necessary.