So the group "post a thing" is easy, but not all my RV designs show up as a selection for me to post ... whatever ... I've a few more shared here in thingiverse @ https://www.thingiverse.com/TyCreek/designs
Welcome to the RV group. You have a lot of great RV things.
I'm not sure why you are having problems posting your things to this group. This is what my screen looks like in edit mode and is how I was able to post all my RV things to this group without any difficulty. See attached file.
Ah... another way, thanks! ... I used the group Thing tab and the Post button there. It brings up a nice selection from my designs but is missing some.
You're welcome. I'm glad it helped.