@ChiChiWerx oh that's how successor works ok thx

You don't even have to keep the original cockpit; as long as you download a post, you can modify as you want and the next time you post it, it will appear as a successor.

However, if you post it, even as an "Unlisted" build, the third post will appear as a successor to that second post and so on, and so on.

The second way to get it to post as a successor is to go into the XML file at the very top of the file, there will be a line which will list the predecessor ID, a sequence of letters and numbers (in fact you can see it in the address bar of your browser, such as: "...simpleplanes.com/a/A1b2C3/Aircraft Post Name...", where "a" signifies aircraft and the ID appears right after). You can copy the predecessor post ID, then copy it into your build's XML file and, presto!, it will appear as a successor to that post when you post it. I found this very helpful when I built a very complex aircraft for a challenge, posted it as "Unlisted" as a test without realizing how the successor system worked and eventually figured out how to fix it through the XML file edit method.

Last, if you have a fairly simple aircraft (without rotators, etc.), you can remove the cockpit, save the rest as a sub-assembly, download the challenge post and use your subassembly in the challenge build, post your new creation and it should appear as a successor.

@CODENAMEBOB @t8erh8er @Avro683Lancaster

@CODENAMEBOB Thanks for your help!

As long as you keep the original cockpit, it will be a successor

@t8erh8er will scaling effect it? Could i place it inside an airplane and have a separate primary?

@Avro683Lancaster Thanks, I appreciate it!

Download the whatever (in this case challenge post)
Edit it as you please, then upload it. It should automatically be a successor.