I've hear nothing but good things about the AAM Short Tails and contemplated them myself based on review and videos. I did my research and still went a cheap route, which I have since corrected, but spent more than I would have initially. I have seen many posts about how Beluga is a waste because of rusting or fitment such as
Beluga Racing axle back poor fitment or
*stay away from beluga racing
+ I agree with what Ventruck said in that thread, "While this isn't a Corvette, let alone a Ferrari, it's a thoroughly-engineered car that doesn't exactly come for chump change. And so you want to pair it with a ~$300 axle back from a company that doesn't carry any real pedigree.."