toss those clips, you won't be needing them.
i'm 30...something...I still like my bassmobile.
I hate country music, but with a decent system and some intestine rattling kick drum, even Shania Twain is tolerable.
I also did installs in the 90's...and 2000's and could set up a system by ear no problems. Used to have people bring me their vehicles cause the sound was all distorted and i would tweak the gains and the low/high pass cutoffs on the amps to fix it up and make it sound 1000% better at 2x the volume....and nobody could figure out how or why.
see, I had some surgery to repair an eardrum when i was a kid, which made my hearing in my left ear have no bass response. as such, I could plug my right ear and hear if the mid's and highs were distorting, then plug my left ear and hear if the bass was distorted. normally our hearing gets overloaded with bass and you can't tell if your mid/highs are distorted because all you hear is bass.
it's not without its caveats though, like in my own vehicle, it can sound like the subwoofer is on the seat next to me when i drive. if I'm in the passenger seat it sounds more even.
