I'm pretty sure you're only missing what you've chosen to miss, the circumstantial evidence which was presented at trial and otherwise.
Mind you, I said evidence that directly ties them to the crime to the exclusion of others. I was not listing circumstantial evidence such the fact they wore black, liked rock music or fibers/sticks/knives that could have come from or belonged to multiple people. With that in mind, what did I miss?
Do you mean you would have rounded up 1000 Special Forces Survival II knifes, or do you imagine that you could find 1000 differently branded knifes which are demonstrably consistent with the wounds which Peretti and Fogleman suggested are consistent with a Special Forces Survival II knife such as the one found behind Baldwin's home?
I'm assuming you're talking about the abrasions that Peretti said were consistent with that type of knife. If so, yes, 1000(maybe more) differently branded knives, not just Special Forces Survival knives, and that's based on Peretti's own testimony, that other than a butter knife, those wounds would have been consistent with just about any serrated knife. His testimony is quoted below.