One of the things I noticed flying in a local RV7A (Thanks to Tracy for taking me up in his RV). I noticed how much space I needed for my long legs. My original plan was to locate the head phone jacks below the vents, however I realize now they take a bit of room in a critical area. I think it is very important for me to re-consider my original choice for placement as I need every inch of space I can get.
I already have the larger 1 5/8" vents from Stein Air. I originally purchased these as they are most similar in size to the stock Vans units. So...I am going to keep those. I decided I am going to trim off the extra tab on the vent mount plates that was reserved for headphone jacks. I'll find somewhere else to put them later.
Best way I figure to trim a nice clean line is to print a cutting template on the 3D printer.
I have a nice clean line/guide that is perfect dimension allowing me to to trim and reshape the vent mount plates.