I've relocated the SAFC & TT into the center vent. I followed the typical fiberglass and bondo route, and it's turned out really well. The pieces slide in with about a 1 mm gap, so it looks good as is, but I'd like to pretty it a bit by putting black trim around each piece for an even cleaner & tighter look.

I'm not sure how to explain what I'd like to use, but think of an o-ring as an example... stretchy, skinny and elasticy. That thickness, but of course, it would have to be about a 3-4" diameter in order to stretch it around the SAFC and TT. (individually of course)

See example (not mine) pic below for what I mean.

Here's what I've thot of:
- black silicone, but I don't think it'll look right. It's gotta be just a thin bead around it, with no start or end point.
- a black rubber band, but has to be round, not flat.
- pinstriping, but I doubt the rounded corners would come out looking good.

Any other suggestions would be appreciated. Thanks.