If you're going to be a pointless language pedant, it really helps if you don't fuck it up.
OP said:
> me and my friends together built an 8 bit CPU…
– and if one replaces that with your suggestion:
> My friends and I together built an 8 bit CPU…
– you'll find that you are, gleefully, wrong.
For those unaware, the simplest test for 'me and x' vs. 'x and I' is that, in the latter case, you should be able to remove 'x and', and have the sentence still make sense.
For example, 'Me and Lucy went to the shops' is technically incorrect, because 'Lucy and I went to the shops' makes sense if we remove Lucy. 'I went to the shops'.
The pendant's adjustment fails this test:
> I together built an 8 bit CPU