John's Antenna Coupler RF Line Spacer

A problem encountered in the lab
No suitable part exists
A 5 second scribble on a page
A 60 second openscad design
A 2 minute print
A 10 second revision
A 2 minute print
A 40 second cleanup
A perfectly fitting part

This is a part to hold an RF transmission line in the centre of a tube as part of a radio experiment apparatus prototype that is being built here. Nothing complicated, just putting it up here in case it is needed in future and to show that not all designs need to be complic