Okay here are the measurements that should help you figure out the angle...
Side piece closest to the front is 36 1/8"....middle of the side piece is 51 3/4"....back of the side piece is 41 3/4". From the front edge to the point plumb with the peak of the cabinet is 7 11/16" and from the back is comes 15 15/16". That should be the 5 points you need for plotting the angle. I know a few of them are a bit odd measurements but hopefully they work out. Also here are a few other measurements I grabbed.
Cab is 20 1/2" wide
Distance from under control panel to the coin door is 10 1/2"
Speaker cutout is about 3 1/2" in diamater.
Lastly here are a few pics of the side and a back view if they help....
Side piece closest to the front is 36 1/8"....middle of the side piece is 51 3/4"....back of the side piece is 41 3/4". From the front edge to the point plumb with the peak of the cabinet is 7 11/16" and from the back is comes 15 15/16". That should be the 5 points you need for plotting the angle. I know a few of them are a bit odd measurements but hopefully they work out. Also here are a few other measurements I grabbed.
Cab is 20 1/2" wide
Distance from under control panel to the coin door is 10 1/2"
Speaker cutout is about 3 1/2" in diamater.
Lastly here are a few pics of the side and a back view if they help....
