Behind the Bumpers with FRC 1678 Citrus Circuits - This team has won a championship division the last 7 championships including 1 championship win and 2 championship finalists. Their robots are always top notch and they are well engaged with the community. https://youtu.be/aExqjdCaraA
At some point, I hope one of these teams that have the 3D printed telescoping launcher guide/back-railing post a guide on how to CAD and print one.
Good practice to try to make your own, too. Then you can compare what you came up with with what they (eventually… maybe…) post.
Digging the spin cycle method.