Thanks for the compliment.

Look here for a detailed discussion with photos covering the work on the barrel, band, ramp, and the details of the ejector rod and base pin. Some good views in there.

Relative to the question of how short is too short, you get into more functional issues than velocity issues when you go under the 4" barrel threshold.
Also, although there are other ways to accomplish this, the barrel band can help keep the ejector rod housing from moving forward on the heavy recoiling light weight revolvers.