elitefts Core Blaster Rack Attachmentelitefts Core Blaster Rack Attachment Every so often a piece of equipment comes along that truly warrants a lot of buzz, and for good reason. This is one such example. The Core Blaster Rack Attachment gives you the benefit of a rotational core trainer, but with much more flexibility. This model does not have a base and bolts directly to your rack. The footprint has the bolt holes 5" apart on center. There are about a million things you can do with