John, thanks so much. You are the best. I can't get this thing printed out fast enough. If you're attaching the "box" to the underneath side of the coal load, what kind of adhesive do you use to plant the rectangllar box to the sloping roof; epoxy or some kind of silicon adhesive? Thanks again, John. This should be fun. ...Tom
OK. So in the Challenger's tender, under the coal load the tender shell is flat, not sloping, with a square opening under about the back half of the area where the load sits (the load is really just a "detail part" that sits on top of the flat shell). So, I first enlarged this opening to be just a bit (1/8" on each side) smaller in length than the speaker/enclosure. Then I CA-d a strip of .020 X .060 styrene to the short ends of the enclosure, then when these "spacers" were dry, I used plastic cement to glue the enclosure/w strips to the flat underside of the tender shell top. Since you have an air-tight enclosure, it's not necessary to use silicone around where the enclosure attaches to the shell. And you want to use some .020 spacers to make sure that the speaker cone doesn't hit the underside of the shell anyway. Last step is to use a #70 drill bit and drill a bunch of holes in the coal load for sound egress. I probably have 25 holes in my coal load (tip: if you drill the holes at an angle, they will be harder to notice). Good luck! John C.
This is very interesting great write up!! Do you have a picture of the holes in you coal load? I have a Tsunami in my GS4 and would love to change out the ones in my 2 Bigboys and Challanger.
