Everything seems to be coming along good. Making more crispy shots with long irons, finally getting my lead arm to stay straighter longer, keeping my weight forward better and starting to get better at moving my hips towards the target instead of spinning out. Now next on my list is this. No matter what I try, it doesn't seem like I'm properly extending on the follow through. Here's a comparison; me and the best golf instructor in the world: that Tom fella. What's his name? 😉. Anyhow, advice, drills, feels and particular school videos always appreciated. I've seen 'em all but sometimes when I go back I find I miss something.
Hey - I look pretty nifty as a lefty..... 😎
I'll suggest a couple of things, @Buford T Ogletree. Have a look at How Does the Downswing Work in the Get Out and Go Play course along with the two drills that immediately follow it.
Also, master the Tees in Armpits Drill excerpted below from the S&T book to the point where both tees stay in place for the entirety of the swing including the follow-through.
That combination ought to get you moving on a good track towards the classic S&T finish (also pictured below).