Hi, Step by step, what are the required parts and actions required to dock two craft? No matter what I do, docking ports do not engage even when perfectly aligned. I have tried all the different types of port but no luck with any of them. I have seen lots of tutorials but there must be some step which is so obvious that it is not in any of them. - Is this a known bug for this release (20.2.186) - Do both docking ports need to be the same size (i.e. can you mate a sr to a junior or vice versa). - Do the ports need to be rotated in a specific direction to engage the magnets? How to tell other than visually via the exterior view? - Do the ports need to be powered (i.e. do I need to have a battery system as part of both craft). - Do both craft need to be manned (i.e. do I need to EVA across a crew member before docking). - Do I need to set the docking port as the target to activate the magnets? - Any action I need to perform on the port to engage the magnets (on target or control craft?) Please don't post links to other tutorials as I have watched a lot of them already and they are clearly all missing something head slappingly obvious - unless you have a tutorial entitled 'Docking Prerequisites' ;-) Edit: I suspect it might be the rotation of the parts when constructing craft is wrong. Testing... Setup: Windows 8 64-bit OEM Intel Core i7-2700K CPU @ 3.50GHz NVIDIA GeForce GTX 680 8.00 GB RAM