I don't have a Blackhawk, but have similar Bob Lee takedown recurves. They are top notch; none better in my opinion. I have two that have the Stabi-Lock, and have had others that didn't have it. The Stabi-Lock is a great system for limb attachment. It adds some weight to the riser, which I considered an advantage, but some would not consider to be an advantage. Their basic 4 bolt limb attachment is already arguably the most secure limb fastening system in the business. Some might consider it overkill. Frankly, I will probably only use the Stabi-Lock a handful of times in the life of the bow, so for me, it is really unnecessary. Unless you see a great need to disassemble the bow frequently, I don't think you need it. OTOH, if you don't mind spending the extra money, go for it!