Radial decoupler attachment.

[harrisjosh2711]

I am having an issue getting my tanks to attach to a radial decoupler. They will attach but they attach inside of my collision mesh instead of t the surface like it should. Everything attaches fine to the tanks surface so long as I'm not trying to place the tanks on radial decouplers. My landing legs attach fine. My aero fins attach fine. But as soon as I try to build a Falcon heavy with decouplers this happens. Now I can pull the tanks out and everything woks fine but I would like to fix it. Maybe node_attach?

Spoiler

PART
{
 name = Falcon9FTbooster2Black
 module = Part
 author = jnh
 mesh = model.mu
 rescaleFactor = .97
 CoMOffset = 0, -6.0, 0
 node_stack_top = 0.0, 15.0, 0.0, 0.0, 1.0, 0.0, 2
 node_stack_connect01 = 0.0, 14.0, 0.0, 0.0, 1.0, 0.0, 2
 node_stack_bottom = 0.0, -13.0, 0.0, 0.0, -1.0, 0.0, 2
 node_stack_dock = 0.0, -15.0, 0.0, 0.0, -1.0, 0.0, 1
 node_attach = 1.25, 0.0, 0.0, 1.0, 0.0, 0.0, 1
 TechRequired = advFuelSystems
 entryCost = 24200
 cost = 5750

Here is my collision mesh in Unity.

Tanks pulled out using move tool.- As you can see it is indeed attached to the decoupler. The decoupler attaches perfectly to the first tank.

 

@CobaltWolf, @steedcrugeon I pinged you guys because you have helped me before and you know much more about KSP than I. Plus no one has answered a single question I have asked in a pretty good while leaving me to solve them by myself or not at all. I figured I would go a different route this time and see if I got different results.

Edited January 4, 2018 by harrisjosh2711

[CobaltWolf]

What diameter is the part? The first value of node_attach should be the part's radius - in this instance, it's currently set up for a 2.5m part with a 1.25m offset. Of course, if the model has some visual variation (for example if there's a reinforced extruded section you want the player to attach it with) you'd want the node_attach to match that radius.

[steedcrugeon]

Also do both parts of the radial decoupler have physics colliders? I found that if the 'artefact part' (the bit that remains after decoupling) had a physics collider it screwed things up so I only had a physics collider on the mesh I wanted my radially attaching things to go on.