I found a nice knurled M6 knob on Thingiverse and printed a pair of them this morning. It might not fail in the time I have left on this Earth but why leave a mess for the next guy. I could see the flange loosening up over time if you're doing what you should and cleaning the vent at least once a year. The other half clamps on the dryer outlet with a hose clamp so should be good there. Then the magnet and tailpiece snap into the mounting bracket and it's held securely.
I'm going to anchor the mounting bracket to the wall, screwing into the plywood, then slip the tailpiece into the end of the pipe and secure it with a couple layers of metal tape. It's enough of a gap that lint and hot, damp exhaust air can leak out behind the dryer right on the wall or maybe even into the wall cavity. If you look there is some space between the mounting bracket and the piece with the magnet. but that doesn't make an air tight connection. Then slip the tailpiece of the magnet into the vent line. The MV-180 instructions say to secure the vent pipe to the wall then screw the mounting bracket to the wall using wall anchors if needed. So will have about a 1.75" offset which is within the 2" allowable margin from what I read. Unfortunately I couldn't get it set directly behind the dryer because there is of course a stud close to center of the dryer outlet. Then ran the flange mounting screws into the ply. I cut a piece of 1/2" plywood about 12x12 and backed up the drywall all around the opening I didn't like securing that flange to the drywall alone. "Did you read my mind? I just installed a magvent this week." So next step if I get some time today is print a test piece only 1 mm thick and check everything fits. Bosch already makes a soft cover or shoe as I call it to prevent the base of the saw from scratching but I did not want to alter it so I made my own. To do that I made a shoe that fits the base of the saw and a piece to connect it to the rail. I recently made a guide for my Bosch EVS1590 jigsaw that allows it to use a FS rail as a guide for long, straight cuts. Because it's a challenge and I think using the lighter cordless DeWalt will be nice. Many will say why go to the trouble if you already have the OF1400. I guess the OF1010 has that too, don't know I only have a OF1400.
Also added a foot to the outboard side of the adapter plate which will mimic the function of the foot on the OF1400. So after getting the bolt pattern off the plunge base it was easy to slide the counterbored holes over in CAD to where they need to be. I grabbed my spare fixed base and had laid out the holes for that but realized when I was revising the adapter plate that this was not going to work. I had never paid attention to that before because, well, you just don't swap the base plate on the two bases so no reason to. As part of my revision I woke up and realized the plunge and fixed bases have different bolt patterns.