Moved on to the last non-LCARS detail of the TFF bridge...the data chips and their holders.
Fllling the gaps between the console "keyboards" on the port and starboard sides of the bridge, there are aluminum boxes with what looks to be six slots for storing data chips on their sides, and a slot in the front where a data chip can be inserted upright and therefore read by the consoles. We get the best look when the crewman goes "bonk bonk" on the head:

And when Scotty's downing an unmarked bag of space potato chips:

In between Kirk and Uhura in this next slot, you can see that the inserted upright chip has a bit of a glow to it, much like how isolinear chips were usually underlit in TNG:
The chips themselves were 10cm by 5cm pieces of beveled lucite with screenprinted graphics on them. Thanks to the prop collectors on sites like
yourprops.com I was able to not only glean the graphic, but the dimensions as well. You can see that the chips have pretty substantial bevels on the edges, leading me to believe that they have a thickness of about 0.4 cm:
We later see one of these chips sticking out the top of Chekov's electronic clipboard:
And in GEN, we see Kirk doing the ole hokey pokey with the chips when adjusting the deflector relay. The chips here, however, have squared edges and a more detailed/busy graphc:
So these are the bridge between the colored "record tapes" of the TOS era and the similar isolinear chips of TNG. I was tickled when I first personally noticed their existence a few years back when researching for my TUC bridge build, and am glad to be able to bring them to life here.
So now, I resume work on the LCARS! I'm actually very excited to generate some of those more animated screens in After Effects!