How to get a double pair?
 

So, I was at a fellow reefer's house. In their 40 breeder display they had a Randall's watchman goby pair and an Alpheus randalli pair. So 4 creatures in one home, all working together to get it done. I personally haven't ever seen this available. How do you pair pistol shrimp together? Are they hermaphrodites like other shrimps? I have heard that they will have the large claw on opposite sides, and saw that with this pairing. Any tips on how to achieve this?

This is something I am interested as well and I have essentially found no information on. I know the goby pairing is typically a trial and error since you can't really sex them reliably. I have two goby/pistol pairs (two different goby's and pistols)in my 75g and would be curious to know how hard it would be to give one of the pairs a mate.