If my Mega Man cart works, that yellow tab will just get sprayed black, I don't mind having the slightly taller case
Well, I think most of us probably do. But I'm sure you are just using it for testing purposes, so more power to you! lol
There was different color Genesis carts? That's news to me, I've never seen any before. My Maximum Carnage cart is black.
Yes, as mentioned before, the red one is a sort of special edition / limited release on both the SNES and Genesis.
How limited? I have no idea. My Genesis cart is
red, and I don't believe I own either Maximum Carnage variant on the SNES.
Actually, it wont work at all. The tabs on the inside that hold the PCB in place are different, so you wont even be able to insert the Metroid PCB in the Doom case.
Your right, I didn't even think about that.
Why Doom? I did a lot of reading on the matter when I was building my first Star Fox 2 cart. Did you get Doom because you wanted the faster FX chip? Doom doesn't have SRAM so you can't save the high scores and whatnot

The FX chip in Stunt Race FX is perfectly fine for Star Fox 2, I would just use that as a donor (and I do).
Yeah, I know you just use
Stunt Race FX as do most people. But I too have done extensive reading on the subject, and it seems since
Star Fox 2 was designed with the
Super FX 2 chip in mind, that it performs at a perhaps slightly smoother frame-rate when using a
Super FX 2 game as a donor cart. The only two with the correct EPROM size are
Doom, and
Winter Gold. While
Winter Gold features SRAM, the game was released in Europe only and is very rare, in addition; the high scores are the only thing that have saving capabilities on
Star Fox 2. Besides, I plan on using several donor carts, as well as experimenting with overclocking, to see which method ends up producing the best overall results. If
Doom ends up yielding the best results, then I will likely purchase a
Winter Gold cart to make my final version.
I'm gonna try putting the EPROM I programmed on another cart and see if it works, but if it doesn't, I'm clueless as to which cart I should use for what game. I really can't find anything on the interweb
Back to the main subject at hand; I'm really wondering why were bothering to try and find the right donor cartridges for Mega Drive games anyway. I mean, since they are so simple, as you described, why can't we employ a method similar to this?:
Reprogrammable Genesis cartridge
http://www.raphnet.net/electronique/genesis_cart/genesis_cart_en.phpI've had that project page bookmarked for quite a while, and simply forgot about it.
I hope that it helps.