5.5" Exhaust ducting to PAC window vent adaptor

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I wanted to vent my laser exhaust out of the window, but I didn't want to take out, and put in the portable AC exhaust duct every time I wanted to use the laser. I designed this to adapt the 5.5" ducting to a magnetic piece, and also the PAC window unit to a matching magnetic piece, and also a blank magnetic piece to put on the PAC unit when the ducting wasnt in use.  This uses (6) 12mmx3mm neodymium magnets per piece. install each magnet in opposite polarity to ensure that you have good strength between pieces (ie for the blank, put 1 magnet + side up, next is + side down, and repeat for the remaining magnets.

There should be a pause on each piece to allow you to drop in the magnets before layer 16 on the straight and blank piece, and layer 26 on the big 90* piece