I put mine back on since I can reinstall/remove it in about 40 minutes now. It still sounds cool, I tamed the most annoying harshness (and some of the vibration) by putting a K&N offroad foam prefilter around it (which should also significantly lengthen the service interval. I padded the area around where it'll be installed with mass damping foam, added mass damping foam to both upper and lower cowls, and added more damping around the tube-to-cowl interface to "seal" it. It's dryer ducting foam so it's relatively high temp but I'd like to find something better suited to "near-turbo" temperatures under the hood just for safety's sake (at least before it hits 100f plus here).
It still bugs me that it kinda thunks around when starting the car. Bead-rolling the places where you clamp it would've made the product "feel" a lot better. As-is, I'm paranoid about the filter sliding off the end of the pipe once a little oil vapor gets in between the K&N filter and the aluminum tube. If this thing were made almost entirely of silicone a lot of the annoying vibration would probably go away too, though I don't know if it's worth it to 2JR for such a niche product. (though, once you do the initial tooling for preformed silicone tubing, production is a lot easier). If anyone's interested, it doesn't appear to be tig welded, it looks like it was aluminum mig welded with a spool gun, and I'd recommend brushing out the inside before installation due to some almost-loose aluminum bits where the smaller tubes penetrate the main one. A right-angle elbow for the PCV hose will make your installation a lot cleaner, too.