sweet looking pods! were you able to get them on a vertical plane or are they angled in following the angle of the a pillar? also, what did you use for the frame of the pod - 1/4" wood? what's the xover freq on your mid?
i'm experimenting with placement of my L1 Pro R2 tweeters and have them in the a pillar right now just mounted on the a pillar plastic. i tested locations and aiming for a while and the best sound i achieved is physically where they are located now, but angled up towards the rear view mirror and slightly on-axis. that made the soundstage open up wide but with a good focused center image. i've been waiting until i figure what i will do with vinyl/carpet before i fiberglass the pods. it looks like you just covered them with fabric and left the oh-sh!t handle in factory vinyl. it actually doesn't look too bad.
eventually i want to go 3-way with a mid in the pillar, but i would need to get another amp for that. you just inspired me to start saving up for it - the wife is not going to like this idea.