Geocache Plug/Cap design

This is a simple Geocache plug to use to create a 3D print into a Geocache. I take this in Tinkercad and place the solid one in the print (lowering the cap below bed) and merge to make the hole, i usually add another post on top to have some distance of end of screw to freely go in all the way, or you can add a longer one to have a really big hole for bigger logs, since your cap doesnt need to be same long length. If you change the size (as i always need to) make note of slight differences, and match height prior to adding a post. After finalizing the size you want make the cap i make slightly smaller diameter than the solid hole with the merge. For instance 43.97mmx43.98mmx34.99mm, cap will be 42.97mmx43.98mmx34.99mm.
If i make big changes i multiply by % both solid and hollow cap then reduce the hollow cap diameter.
And/Or this could give you idea to make your own on tinkercad. learning curve always