SO I CONSTRUCTED MY MODEL BUT I WANT TO BE ABLE TO EDIT HOW FAR THE ANGLE GOES DOWN THE C CHANNEL.. IT HAS IT FLUSH AT THE BOTTOM AND I WANT IT TO GO UP A FEW INCHES... ALL THE SMART DIMENSIONS GIVE ME EVERYTHING EXCEPT THIS DIMENSION.

HOW DO I GET THE ANGLE TO GO UP,

THANKS

SEE ATTATCHED PICTURE