Train Horn Mounting in SUT

I have seen how other people have posted their horns before but I am looking for suggestions on a possible bracket design that will hold the compressor and tank so they don't have to be mounted directly to the wheel well.... below are pictures of the items I plan on using as well as some previous pictures from other installs.
 
any info or suggestions would be appreciated.
 

 

 
These are the horns I am going with
 

 
I am adding triple solenoids and will be running 2  3/8" Braided Lines from the tank thru the Drain hole... one will power the horns and the other is planned for running a second line with a quick connect for airing up and using a ratchet if works
 

 
I am going with a 3 gallon tank
 

 
and a Air Zenith Compressor with a 175 psi pressure valve on the tank
 

any clip of the sound