I have 3 1/6 barrel and one 1/4 barrel sankes. I would like to trade them for several ball lock corneys. The 1/4 barrel has part of the top rim removed to make it easier to lock the coupler on. I started doing this to one of the 1/6 bbs also but didn't get to finish before I moved. I can include couplers if quick disconnects are included. Not sure what to ask for them as far as selling.