You're absolutely right; in order to get the board to boot like this, all you need is custom regs, wifi, bluetooth, and U10 relocated. Granted, you technically also need SD/USB to be able to boot games(unless you're making the world's smallest VC), but that's a walk in the park compared to what's already done.
I have no idea about the actual performance of these heatsinks...because I don't have a wiimote, or homebrew...or any way to play games at all for that matter. So I can't stress test this by any means. However, I feel fairly confident that as long as I have a fan, this should be adequate. If not, I've got a lot of options, including some parts that I've stored away for this specific endeavor for years. We'll figure this out too.
For those of you following this thread who're wondering how to do all of this, fret not. Full, detailed guides are coming out very soon. I had to do all of this personally in order to verify the integrity of the information, as well as test everything myself in order to determine the entirety of what is and isn't necessary. All this testing is the only thing standing between months of research and a public release of information. Even during my work today on stream, I found an entire picture diagram I wanted to make. Rest assured, it is worth the weight.
SS