My TC has never been able to jump in the air, but a new MT prop and tweaking the MP, RPM to upper limits sure helps. Now we have ground run less than 1000 feet.
Last October I called MT and asked if they could put on their 4-blade Malibu prop on my Commander, but they said the engine was not powerful enough and suggested another one, which I ordered.
In March prop, spinner and hub was ready and I went to Germany for the flight tests necessary to get the STC, which they would do it if they could borrow my plane for the flight test. Day one went with reference measurements on the McCauley and next day the new mt prop was installed and tested in many different flight conditions. On the third day all the noise measurements was done. Very nice people and I learned a lot about props in those three days.
After a lot of paperwork and waiting, the STC was ready in August for all 114 Commanders to enjoy. I do not know who sponsered the other 114 models for tests, maybe Carl knows?