Thanks for all the replies :mrgreen:
I'm definitely going to be switching over to the wilsonminesco website as it has much more information.
I also fixed the 555 timer, and it seems to be running at much more even on and off times.
As with the can oscillator, I wasn't able to find any with less ...

I am attempting to learn how the 6502 works, and I came across an online tutorial by Ben Eater: https://www.youtube.com/watch?v=LnzuMJLZRdU .
I've gotten stuck at 7:30 in the video, where he demonstrates the 6502 doing.. something. When I attempt to run mine, it just freezes with pins a0-a15 like so ...