I think it would have to be done like the "how-to" section.
In other words, it would need to have a moderator review all the submissions. If it was fully open to comments and other reviews it would turn into a mess. We already see it on the forums, one person says a part is a POS, someone else says it works great, the failure was improper installation or use vs a POS part.
I think it would be a great thing to have, but it would require a lot of moderator time to make it truly useful.
Seems like the rear disk install would be more of a "how to" deal than a review deal. I've installed the 11.7's, there aren't step by step instructions (which would be nice!!!) with them but it wasn't that bad of an install.
