I have an Overdrive with a connexion hinge, and I personally think it is a great longbow. I killed a bull elk three years ago with it. My son Kory also has a bow that Dick gave to him that he has been using for several years now, and has taken many animals with. Needless to say he shoots it very well. I think the overdrive shoots a bit harder and faster than the others, and I do own one other Robertson longbow....but they all shoot great, and they are at the top of the heap IMO, as top-notch. I own several other longbows and have been shooting them for decades....some are as good, maybe in some ways a bit better, but I find it intersting that whenever I shoot longbows, I use Dicks designs as the benchmark for comparison. That says something. Also the fact that most longbows built today, emulate designs that Dick made popular and filled the hands of aspiring longbow shooters with for many years...a major reason we are all shooting longbows today still.
You ca'nt really go wrong with a Robertson.