[CA] [CA11] dragonfly 5 transducer info

[mtnbowhunter]

So I downloaded the info on how to install a thru Hull transducer but it mentions nothing about how to set it up to change the front to rear angle of the transducer so that the sonar shows the fish images properly
There is a lot of info on how to cut the transducer mounting bracket to make up for the V angle on a v Hull but nothing about four to aft shimming to get the correct transducer mounting

With the stern mounted transducer it's at about 11 degree angle compared to the hull to work properly on my boat
So are there shims included with a transducer to make up for that angle difference required or is that something I have to make up myself???
Also I am curious as white a thru Hull transducer cost $250 while it's turned mounted transducer only cost $90 what can there be that makes up a $200 difference?????