HI Bill..Not difficult at all..Just cut the right size hole , sink in the dog bowl upside down, drill a few holes and screw it down to your home made body and wa la..You have a dog bowl resonator..I will post a picture of the one I just got done with in a few minutes..Jim
I agree with Jim. Easy as pie. The trick is cutting the hole and for that... I use a Dremel circle cutter. I tried lots of options and in the end game, that circle cutter did a better job than anything else I've tried. It works with the cheapest Dremel tool and was well worth the investment.
Amazon ASIN: B000HI5WTY
For twelve bucks and the cost of the Dremel tool... worth every penny.