I have an Oehler 35P and it is a fine piece of equipment. That said, it is a bit of a pain to set up with all of the components. Also tried using one indoors and was unsuccessful as the lighting was insufficient.

Max Prasac

Semper Fidelis

BIG IRON: https://www.youtube.com/watch?v=L6aXjMH5C30

Gun Digest TV's Modern Shooter: https://www.youtube.com/watch?v=nGo-KMpXPpA&t=7s