bungee-

Yes please

Here Quick save after each step, steps are named. DropBox_KSP_save.7z

Tested on Kerbin again this time I added the fairings and docking port was directly attached to the fairings part. Fairings were jettisoned and when I docked the two vessels together they stuck. And I was not saving in between. What I notices in debug window there is a bunch of exceptions when using vessel with the fairings. [Exception]: ArgumentOutOfRangeException: Argument is out of range. Parameter name: index.

Well as I recall it was pretty uneventful "wet spaghetti" launch for both crafts. I'll try to "dry" dock crafts on Kerbin. I'll report the results. Is there any way to produce more detailed log? I'm willing to put more effort into it. [edit] Results of "dry" docking ... I used new save and I put together allot of cars docked, undocked and mess around with them the undockable port was not reproduced. I even built small craft powered by RCS and hack gravity and to the same result - not reproducible. Trying now with smaller craft in orbit

I have the same problem. So I tried to recreate it in stock. And I was successful in recreating the bug. There is no info in the debug window regarding docking. So this was the procedure: 1. Create craft with multiple docking ports ( Standard size ). 2. Create smaller craft with two docking ports on it. 3. Dock those crafts in Kerbin orbit. 4. Dock second small craft ( three in total ) 5. Redock one of crafts to another port. I moved it like sho on picture. This was the last craft that was docked. 6. The first docked craft became undockable. Version used: 1.1.3.1289(x64) on windows 10. Here is link to save file: DROPBOX link.z7 P.S.: All crafts were built from scratch on freshly installed KSP.

Did you upgrade the MechJeb? I had same issue in 1.1.3 when I was using outdated MechJeb.

[IMG]http://images.akamai.steamusercontent.com/ugc/402305544747521965/1C561D82CBF3EFD2574CDFD2391269BE45C21AED/[/IMG] [IMG]http://images.akamai.steamusercontent.com/ugc/402305544747521664/2D8F05215A73B745E3A6794C3DE0F964CE6ED908/[/IMG] SharkWhale

Just wanted to say t(h)ank you! Now my shuttle fuel tank looks like it should.

Can anybody tell me if it is possible to add functionality to existing stock Docking ports. Like plugin that would extend the built-in parts? Or I have to create parts and add the functionality I wish?

I second that.

What about alpha access to the non-mapped-un-finished part?

Try with IE or Firefox. I found out that Chrome doesn't allow to select moons.