I actually wound up seeing these on the Google Drive folder a few days before you put them up on YT, but now's as good a time as ever to share my thoughts on this new batch!
It's a toss-up between 222/223 and 506/507 as my favorites here, the latter is a pretty eclectic mix of some neat sound effects (my favorites being the charmingly offbeat "Comic Machine Running" effects) in spite of how haphazardly put together it is, the fomer has a ton of wonderful big band "showtime"-type tracks along with a healthy dose of string-led pieces which have a very 50s feel that I've always loved. I once had a digital copy of a sampler record I found on eBay that had a few of the cuts from that album featured, so it feels like a nice reunion hearing them once more (also, love how some cheeky person named one of the cues after the label itself!).
303 is also a fun listen with its great 80s tracks, almost sounding like they came from a news program or corporate training video of the day. And while, as you said in your description, 86/87 isn't the most exciting of their effects albums, there's a few standout cuts to me like the reverby monster footsteps, and I'm glad it's been archived.
As always, thanks for sharing these audio delights, pal! I've been wanting to hear a couple of these for a while, and I'm glad they didn't disappoint whatsoever.