Not sure if you caught what he said, because he ran thru it so quickly, but, if you don't want the fly too long then don't tie in a tail but just start with your first bundle reverse wrapped right at the rear... and that's how I started tying them earlier this year since even without the tail, I can still get a 4" fly without the extra material and weight of a specific tail piece. Because my hook sits so far forward, I noticed some smallies that if not particularly aggressive would come from behind, suck in the rear portion of the fly and never take in the hook, basically hitting it short and so I wanted to shorten my fly up just a bit.
Besides the plunk, which I have to try, he was pretty adamant about not removing any underfur from the bundles. I have been removing quite a bit of it so as not to "clog" up the gap. I learned this year, I want a wide gap hook, and even went to widening the gap a touch more because of all the bulk on the front of the fly. Lefty claimed that you would get better hook sets if you can keep that hook gap more material free. I'm going to try and leave all that underfur in and see if the action is improved but may call for even a larger hook than I used this year or widen the gap further. One thing for sure, it has some nice shake n' bake action and will catch smallies.