Change radial decoupler orientation or attachment part

Solution 1:

1. Build your satellite (only the satellite).
2. Put your favourite radial decoupler on it.
3. Put the part you want to attach it to on the decoupler.
   • If you're not sure what part that will be, or you want multiple satellites on the same part, just use a cubic strut.
4. Grab the re-root tool.
   • 4 on the keyboard, or upper-left of your viewport, looks a bit like the letter Z.
5. Click a couple of times on the part added in step 3.
   • It's weird in that you might need to click twice for it to take effect, pay it no mind. :)
6. Grab it by the part added in 3 (the whole vessel should move), and save it as a subassembly.
   • It's somewhere in the part selector. You might need to expand the advanced tools at the very upper left of the toolbar.
7. Load up your rocket and attach the new subassembly to it.
8. Your satellite is now attached with a reversed radial decoupler.

Admittedly, I haven't done this for a couple of versions, but it should probably still work. :)