shroomzofdoom

I discovered Lego Technic only a year ago and have probably gone a bit overboard. Every now and again, I stumble upon a part that I am surprised is not more widespread in use. The UCS AT-AT showed me that these exist and I was like 'Whoa, what else am I missing?!?'

When the 3L pin with bush stop is too long and you need it to be only 2L. Analogy: A 3L pin with bush stop (orange) and 3L pin with axle (red) both exist Therefore, if a 2L axle/pin (blue) exists...then a 2L pin with bush stop (gray) should also exist. (without the use of Xacto knife and cigarette lighter)

Questions: 1. Do these exist in nature? 2. If not, what part should I be using? 3. Does anyone else find they need these from time to time? I just figured maybe I was doing something wrong.