[Rafael2215]

I appreciate your good will, but perhaps I have'nt made myself clear enough.
I have the manual, I have all the drawings, all I ask is for someone to tell me whether I got it right or not, so we don't waste our time again building another incorrect bump.
So, again, I'm refering to the trapezoid profile of the bump: the top base is 12 inches long, the height is 13.25 inches, and the lower base is 38.5 (=13.25*2+12) inches long (while the side of the tunnel which is in contact with the bump is 32 inches long, which means the bumps extend longer over the length of the FIELD than the tunnel does), making the angle of the sides 45 degrees.
Am I right?