Orin, as What pointed out the clicks are between 7-12mm. I was able to collect at least half a dozen adults that were wandering on the wood, but I am sure that there is bound to be more of them in the bigger pieces that haven't been pulverized.
I do not know the original collection data of the D. tityus but I was told the colony which they come from has been reared in captivity for a long time (5+ years).