Hi. I spent about half an hour trying to dock 2 vessels using the Clamp-o-tron ports but despite them touching several times (and knocking eachother away from one another) they wouldn't connect at all. Is there something you need to do to the ports to have them docked? Is there a list anywhere of items that can dock together? (I've docked twice before, successfully, using the 'covered' ports but never the c-o-t's) Thanks.