I had a similar epiphany. For the last four years that I've had it, I've been riding my longboard with a lone single fin, and last march I was cleaning out the car and found the side bites that came with it, I said what the heck and slapped them on and it made a world of difference. I can turn much smoother and casual and I don't bog down on the mushy stuff as much as I used to.
I need to do more experimenting with fins
It's been 4 years between car cleanings? I thought I was a dirty kid but you're making me look like Martha Stewart.