Fishfinder and transducer help

I suspect this question has been asked many times before. like some ideas. I have a new Colorado xt pontoon. Fished a bunch at Big Virginia this past summer and caught many trout The largest 7.5 lbs. Bought a Garmin striker 4 due mainly for the gps and color screen. Would like some ideas about homemade mounts for the FF and transducer. Made a waterproof battery box. Got a bunch of money invested and would like to fabricate a mount. Researched the float tube fanatics mounting system but I want the transducer to be lower in the water and their non powered mount is way expensive. Any ideas will be appreciated. Thanks in advance.

There are some good ideas here i am sure some people will share soon. I will look for some of the lonks as well to help.

In this shot you can see the finder mount is on wood that is attached to the frame of the Colorado XTS.
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Here you can see the transducer mounting. In the previous picture you can see how it is attached to the basket (in the upper right area).
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Below the seat in the water you can see my transducer.
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Thanks, looks good. Will try that and see if it works for me.