In a different day and age, someone would drill a piece out, add something fun, gun powder, a giant dog turd, half of a dead carp, can of beans, many options, then let him steal it.
PVC pipe parts. Those are 3>2" reducers and some bushings, 3/4" pipe, stainless roof flashing for the diaphragms and craft foam rubber sheets to make the gaskets. Those 3 are tuned to sound like a Nathan M3. I downloaded a tuner app for my iPhone to set the tones. They exceed 130 DB. This guy offers an excellent set of plans and videos for cheap that will have you building a set in no time. Lots of free info out there as well.
Those are awesome We have a trucking company that delivers diesel to the plant, the owner has a set of chrome one's his Peterbuilt - facing outwards just behind the front fender, he states it blows little compacts off the highway when they cut him off
Thanks a lot now Ive got yet another thing I want to do Looks like a pretty easy cheap thing to do Im adding it to the list.