That's probably exactly why "cut the tabs" responses are so prevalent. The adapters out there are cheap unlicensed devices mostly made in Taiwan and what have you. I don't think information on them is ever going to be that great. For many players of Super Famicom games, it doesn't really matter to them what kind of adapter they get, though, since there aren't a huge number of games with enhancement chips:

http://en.wikipedia.org/wiki/List_of...ancement_chips

And not all of those on the list use the extra pins. Going through that list, quite a few got US release, and of the Japanese exclusives, it's mostly stuff like sports and shogi, which most gamers don't care about, or RPGs and other text-heavy stuff, which a lot of importers avoid (although I don't, so it's important to me to be able to play stuff like Star Ocean, Marvelous, and Tengai Makyo Zero).

So if you really want to spend the time and money to get one of those dumb adapters, they can get the job done for the most part. But if you care about Super Famicom games with enhancement chips, it makes a lot more sense to modify and it's a good solution for anybody looking to play Super Famicom games.