I know the screen border still needs a little filing, but it's too late now anyway since the screen is glued in. Oh well, it's not really that bad at all, anyway.
Thanks for the compliments, too!
I got my Atari carts yesterday, and I found I have enough room (just BARELY) to have the cart slide in the top. I needed a way to mount the PC board I had the slot soldered to, but I didn't have brackets small enough. So, I took some NES shielding, cut it up and bent and soldered it into some tiny brackets. They're really strong, especially with the triangle soldered on one side.
The spacers are there to take the force of putting in a cartridge and distribute it to the top of the PC board. Otherwise, it would rip the traces off after a few cart insertions.
There is
almost no room for the cart. I had to dremel all the way to the bottom of the bottom half and in the top half the cart clears the components on the screen by about a tenth of a millimeter. But, it fits! So, next I need to wire the cartridge slot to the FB2, put in the volume control and select/reset buttons, and paint the bottom half.