I have very similar combo. In reading your replies to some of the suggestions I am reminded of the way several of the TF p-51s
have had trouble landing, that is, running out of elevator on touch down. Here is my suggestion. Remove the down elevator trim mixed into the flaps, rethink your approach to the end of the runway as you set up to land. Here is what I do(after watching several of the best flyers land their P-47s) I come into my final with the 47 at about 200' to 250' altitude and about the same distance out. Here's the tough part. Throttle right back and let the plane fall naturally into what appears to be a very steep landing approach. You will find that the combination of drag and the flaps will allow the plane to come down steeply but completely under control, as a matter of fact, you will be amazed at how controlable it will be. You will see that there is an angle where the rate of descent balances the drag, As you near the runway apply up elevator to flair and cut your power completely, The plane will take a natural attitude and bleed off airspeed allowing a nice slow landing to be made. I know this sounds crazy but once you get the hang of it you will never land your 47 the other way. Those TF-P51 flyers I mentioned before all have gone over to this style of landing and have been amazed at how easy it is to land this way once you get over the thought of your plane landing out of such a steep approach. My TF-P-47 lands like a Sig Kadet with this method and I get a real kick out of other pilots who have never seen this method yelling that I'm way to high on final. Works the same with my TF-Corsair also. I first saw a pilot land this way at a warbirds event 3 years ago. He was flying a 75lb!!! Seafury with a 3w 250 engine and used this method to land from around 400' altitude on to a 400' foot runway and used about 150' of the runway. Try it, It really works. By the way, I also have a 60 size TF P-47. Doesnt fly anything like the GS so don't expect things to carry over.
Larry